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Finding the Fourth Proportional to 87,388.48, 130,800.72 and 45,210.48

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Solution

The fourth proportional to 87,388.48, 130,800.72 and 45,210.48 is: 67,669.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,388.48 : 130,800.72 = 45,210.48 : x
  2. Step 2: Convert to fraction form
    87,388.48/130,800.72 = 45,210.48/x
  3. Step 3: Cross multiply
    87,388.48x = 130,800.72 × 45,210.48
  4. Step 4: Simplify right side
    87,388.48x = 5,913,563,335.55
  5. Step 5: Solve for x
    x = 5,913,563,335.55/87,388.48
  6. Step 6: Final answer
    x = 67,669.83

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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.