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Finding the Fourth Proportional to 135,151.80, 186,495.20 and 74,712.70

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Solution

The fourth proportional to 135,151.80, 186,495.20 and 74,712.70 is: 103,095.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,151.80 : 186,495.20 = 74,712.70 : x
  2. Step 2: Convert to fraction form
    135,151.80/186,495.20 = 74,712.70/x
  3. Step 3: Cross multiply
    135,151.80x = 186,495.20 × 74,712.70
  4. Step 4: Simplify right side
    135,151.80x = 13,933,559,555.48
  5. Step 5: Solve for x
    x = 13,933,559,555.48/135,151.80
  6. Step 6: Final answer
    x = 103,095.63

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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.