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Finding the Fourth Proportional to 135,689.79, 187,250.67 and 75,260.55

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Solution

The fourth proportional to 135,689.79, 187,250.67 and 75,260.55 is: 103,858.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,689.79 : 187,250.67 = 75,260.55 : x
  2. Step 2: Convert to fraction form
    135,689.79/187,250.67 = 75,260.55/x
  3. Step 3: Cross multiply
    135,689.79x = 187,250.67 × 75,260.55
  4. Step 4: Simplify right side
    135,689.79x = 14,092,588,412.07
  5. Step 5: Solve for x
    x = 14,092,588,412.07/135,689.79
  6. Step 6: Final answer
    x = 103,858.87

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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.