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Finding the Fourth Proportional to 135,689.60, 187,262.86 and 75,279.70

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Solution

The fourth proportional to 135,689.60, 187,262.86 and 75,279.70 is: 103,892.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,689.60 : 187,262.86 = 75,279.70 : x
  2. Step 2: Convert to fraction form
    135,689.60/187,262.86 = 75,279.70/x
  3. Step 3: Cross multiply
    135,689.60x = 187,262.86 × 75,279.70
  4. Step 4: Simplify right side
    135,689.60x = 14,097,091,921.94
  5. Step 5: Solve for x
    x = 14,097,091,921.94/135,689.60
  6. Step 6: Final answer
    x = 103,892.21

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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.