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Finding the Fourth Proportional to 105,146.40, 157,460.40 and 69,895.20

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Solution

The fourth proportional to 105,146.40, 157,460.40 and 69,895.20 is: 104,670.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,146.40 : 157,460.40 = 69,895.20 : x
  2. Step 2: Convert to fraction form
    105,146.40/157,460.40 = 69,895.20/x
  3. Step 3: Cross multiply
    105,146.40x = 157,460.40 × 69,895.20
  4. Step 4: Simplify right side
    105,146.40x = 11,005,726,150.08
  5. Step 5: Solve for x
    x = 11,005,726,150.08/105,146.40
  6. Step 6: Final answer
    x = 104,670.50

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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.