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Finding the Fourth Proportional to 87,555.52, 120,831.14 and 53,553.34

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Solution

The fourth proportional to 87,555.52, 120,831.14 and 53,553.34 is: 73,906.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,555.52 : 120,831.14 = 53,553.34 : x
  2. Step 2: Convert to fraction form
    87,555.52/120,831.14 = 53,553.34/x
  3. Step 3: Cross multiply
    87,555.52x = 120,831.14 × 53,553.34
  4. Step 4: Simplify right side
    87,555.52x = 6,470,911,123.01
  5. Step 5: Solve for x
    x = 6,470,911,123.01/87,555.52
  6. Step 6: Final answer
    x = 73,906.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.