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Finding the Fourth Proportional to 87,148.80, 130,528.80 and 75,484.80

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Solution

The fourth proportional to 87,148.80, 130,528.80 and 75,484.80 is: 113,058.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,148.80 : 130,528.80 = 75,484.80 : x
  2. Step 2: Convert to fraction form
    87,148.80/130,528.80 = 75,484.80/x
  3. Step 3: Cross multiply
    87,148.80x = 130,528.80 × 75,484.80
  4. Step 4: Simplify right side
    87,148.80x = 9,852,940,362.24
  5. Step 5: Solve for x
    x = 9,852,940,362.24/87,148.80
  6. Step 6: Final answer
    x = 113,058.82

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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.