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Finding the Fourth Proportional to 103,909.32, 143,299.17 and 65,602.29

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Solution

The fourth proportional to 103,909.32, 143,299.17 and 65,602.29 is: 90,470.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,909.32 : 143,299.17 = 65,602.29 : x
  2. Step 2: Convert to fraction form
    103,909.32/143,299.17 = 65,602.29/x
  3. Step 3: Cross multiply
    103,909.32x = 143,299.17 × 65,602.29
  4. Step 4: Simplify right side
    103,909.32x = 9,400,753,707.10
  5. Step 5: Solve for x
    x = 9,400,753,707.10/103,909.32
  6. Step 6: Final answer
    x = 90,470.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.