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Finding the Fourth Proportional to 135,880.39, 187,472.89 and 78,498.77

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Solution

The fourth proportional to 135,880.39, 187,472.89 and 78,498.77 is: 108,304.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,880.39 : 187,472.89 = 78,498.77 : x
  2. Step 2: Convert to fraction form
    135,880.39/187,472.89 = 78,498.77/x
  3. Step 3: Cross multiply
    135,880.39x = 187,472.89 × 78,498.77
  4. Step 4: Simplify right side
    135,880.39x = 14,716,391,273.35
  5. Step 5: Solve for x
    x = 14,716,391,273.35/135,880.39
  6. Step 6: Final answer
    x = 108,304.01

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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.