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Finding the Fourth Proportional to 135,737.78, 187,337.49 and 78,365.63

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Solution

The fourth proportional to 135,737.78, 187,337.49 and 78,365.63 is: 108,155.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,737.78 : 187,337.49 = 78,365.63 : x
  2. Step 2: Convert to fraction form
    135,737.78/187,337.49 = 78,365.63/x
  3. Step 3: Cross multiply
    135,737.78x = 187,337.49 × 78,365.63
  4. Step 4: Simplify right side
    135,737.78x = 14,680,819,987.97
  5. Step 5: Solve for x
    x = 14,680,819,987.97/135,737.78
  6. Step 6: Final answer
    x = 108,155.74

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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.