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Finding the Fourth Proportional to 78,708.49, 108,614.54 and 42,897.73

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Solution

The fourth proportional to 78,708.49, 108,614.54 and 42,897.73 is: 59,197.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,708.49 : 108,614.54 = 42,897.73 : x
  2. Step 2: Convert to fraction form
    78,708.49/108,614.54 = 42,897.73/x
  3. Step 3: Cross multiply
    78,708.49x = 108,614.54 × 42,897.73
  4. Step 4: Simplify right side
    78,708.49x = 4,659,317,210.99
  5. Step 5: Solve for x
    x = 4,659,317,210.99/78,708.49
  6. Step 6: Final answer
    x = 59,197.14

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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.