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Finding the Fourth Proportional to 364,812.10, 547,218.15 and 128,130.10

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Solution

The fourth proportional to 364,812.10, 547,218.15 and 128,130.10 is: 192,195.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,812.10 : 547,218.15 = 128,130.10 : x
  2. Step 2: Convert to fraction form
    364,812.10/547,218.15 = 128,130.10/x
  3. Step 3: Cross multiply
    364,812.10x = 547,218.15 × 128,130.10
  4. Step 4: Simplify right side
    364,812.10x = 70,115,116,281.32
  5. Step 5: Solve for x
    x = 70,115,116,281.32/364,812.10
  6. Step 6: Final answer
    x = 192,195.15

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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.