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Finding the Fourth Proportional to 87,328.80, 130,798.80 and 75,664.80

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Solution

The fourth proportional to 87,328.80, 130,798.80 and 75,664.80 is: 113,328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,328.80 : 130,798.80 = 75,664.80 : x
  2. Step 2: Convert to fraction form
    87,328.80/130,798.80 = 75,664.80/x
  3. Step 3: Cross multiply
    87,328.80x = 130,798.80 × 75,664.80
  4. Step 4: Simplify right side
    87,328.80x = 9,896,865,042.24
  5. Step 5: Solve for x
    x = 9,896,865,042.24/87,328.80
  6. Step 6: Final answer
    x = 113,328.76

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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.