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Finding the Fourth Proportional to 119,892.40, 165,455.52 and 65,447.80

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Solution

The fourth proportional to 119,892.40, 165,455.52 and 65,447.80 is: 90,320.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,892.40 : 165,455.52 = 65,447.80 : x
  2. Step 2: Convert to fraction form
    119,892.40/165,455.52 = 65,447.80/x
  3. Step 3: Cross multiply
    119,892.40x = 165,455.52 × 65,447.80
  4. Step 4: Simplify right side
    119,892.40x = 10,828,699,781.86
  5. Step 5: Solve for x
    x = 10,828,699,781.86/119,892.40
  6. Step 6: Final answer
    x = 90,320.15

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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.