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Finding the Fourth Proportional to 78,605.29, 108,268.68 and 60,421.24

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Solution

The fourth proportional to 78,605.29, 108,268.68 and 60,421.24 is: 83,222.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,605.29 : 108,268.68 = 60,421.24 : x
  2. Step 2: Convert to fraction form
    78,605.29/108,268.68 = 60,421.24/x
  3. Step 3: Cross multiply
    78,605.29x = 108,268.68 × 60,421.24
  4. Step 4: Simplify right side
    78,605.29x = 6,541,727,898.76
  5. Step 5: Solve for x
    x = 6,541,727,898.76/78,605.29
  6. Step 6: Final answer
    x = 83,222.49

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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.