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Finding the Fourth Proportional to 87,148.71, 130,549.73 and 68,340.51

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Solution

The fourth proportional to 87,148.71, 130,549.73 and 68,340.51 is: 102,374.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,148.71 : 130,549.73 = 68,340.51 : x
  2. Step 2: Convert to fraction form
    87,148.71/130,549.73 = 68,340.51/x
  3. Step 3: Cross multiply
    87,148.71x = 130,549.73 × 68,340.51
  4. Step 4: Simplify right side
    87,148.71x = 8,921,834,786.86
  5. Step 5: Solve for x
    x = 8,921,834,786.86/87,148.71
  6. Step 6: Final answer
    x = 102,374.83

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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.