Home / 87,288.11-130,989.59-47,872.91

Finding the Fourth Proportional to 87,288.11, 130,989.59 and 47,872.91

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Solution

The fourth proportional to 87,288.11, 130,989.59 and 47,872.91 is: 71,840.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,288.11 : 130,989.59 = 47,872.91 : x
  2. Step 2: Convert to fraction form
    87,288.11/130,989.59 = 47,872.91/x
  3. Step 3: Cross multiply
    87,288.11x = 130,989.59 × 47,872.91
  4. Step 4: Simplify right side
    87,288.11x = 6,270,852,383.82
  5. Step 5: Solve for x
    x = 6,270,852,383.82/87,288.11
  6. Step 6: Final answer
    x = 71,840.85

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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.