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Finding the Fourth Proportional to 87,302.76, 130,963.80 and 31,155.96

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Solution

The fourth proportional to 87,302.76, 130,963.80 and 31,155.96 is: 46,737.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,302.76 : 130,963.80 = 31,155.96 : x
  2. Step 2: Convert to fraction form
    87,302.76/130,963.80 = 31,155.96/x
  3. Step 3: Cross multiply
    87,302.76x = 130,963.80 × 31,155.96
  4. Step 4: Simplify right side
    87,302.76x = 4,080,302,914.25
  5. Step 5: Solve for x
    x = 4,080,302,914.25/87,302.76
  6. Step 6: Final answer
    x = 46,737.39

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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.