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Finding the Fourth Proportional to 135,504.87, 186,981.30 and 75,060.45

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Solution

The fourth proportional to 135,504.87, 186,981.30 and 75,060.45 is: 103,574.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,504.87 : 186,981.30 = 75,060.45 : x
  2. Step 2: Convert to fraction form
    135,504.87/186,981.30 = 75,060.45/x
  3. Step 3: Cross multiply
    135,504.87x = 186,981.30 × 75,060.45
  4. Step 4: Simplify right side
    135,504.87x = 14,034,900,519.59
  5. Step 5: Solve for x
    x = 14,034,900,519.59/135,504.87
  6. Step 6: Final answer
    x = 103,574.88

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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.