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Finding the Fourth Proportional to 135,399.89, 186,862.36 and 74,976.15

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Solution

The fourth proportional to 135,399.89, 186,862.36 and 74,976.15 is: 103,472.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,399.89 : 186,862.36 = 74,976.15 : x
  2. Step 2: Convert to fraction form
    135,399.89/186,862.36 = 74,976.15/x
  3. Step 3: Cross multiply
    135,399.89x = 186,862.36 × 74,976.15
  4. Step 4: Simplify right side
    135,399.89x = 14,010,220,332.71
  5. Step 5: Solve for x
    x = 14,010,220,332.71/135,399.89
  6. Step 6: Final answer
    x = 103,472.91

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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.