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Finding the Fourth Proportional to 134,711.40, 185,912.80 and 74,293.86

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Solution

The fourth proportional to 134,711.40, 185,912.80 and 74,293.86 is: 102,531.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,711.40 : 185,912.80 = 74,293.86 : x
  2. Step 2: Convert to fraction form
    134,711.40/185,912.80 = 74,293.86/x
  3. Step 3: Cross multiply
    134,711.40x = 185,912.80 × 74,293.86
  4. Step 4: Simplify right side
    134,711.40x = 13,812,179,535.41
  5. Step 5: Solve for x
    x = 13,812,179,535.41/134,711.40
  6. Step 6: Final answer
    x = 102,531.63

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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.