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Finding the Fourth Proportional to 187,419.76, 281,129.40 and 61,059.80

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Solution

The fourth proportional to 187,419.76, 281,129.40 and 61,059.80 is: 91,589.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,419.76 : 281,129.40 = 61,059.80 : x
  2. Step 2: Convert to fraction form
    187,419.76/281,129.40 = 61,059.80/x
  3. Step 3: Cross multiply
    187,419.76x = 281,129.40 × 61,059.80
  4. Step 4: Simplify right side
    187,419.76x = 17,165,704,938.12
  5. Step 5: Solve for x
    x = 17,165,704,938.12/187,419.76
  6. Step 6: Final answer
    x = 91,589.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.