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Finding the Fourth Proportional to 360,086.10, 540,129.15 and 123,431.10

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Solution

The fourth proportional to 360,086.10, 540,129.15 and 123,431.10 is: 185,146.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    360,086.10 : 540,129.15 = 123,431.10 : x
  2. Step 2: Convert to fraction form
    360,086.10/540,129.15 = 123,431.10/x
  3. Step 3: Cross multiply
    360,086.10x = 540,129.15 × 123,431.10
  4. Step 4: Simplify right side
    360,086.10x = 66,668,735,126.57
  5. Step 5: Solve for x
    x = 66,668,735,126.57/360,086.10
  6. Step 6: Final answer
    x = 185,146.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.