Home / 87,007.31-130,378.11-64,712.87

Finding the Fourth Proportional to 87,007.31, 130,378.11 and 64,712.87

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Solution

The fourth proportional to 87,007.31, 130,378.11 and 64,712.87 is: 96,970.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,007.31 : 130,378.11 = 64,712.87 : x
  2. Step 2: Convert to fraction form
    87,007.31/130,378.11 = 64,712.87/x
  3. Step 3: Cross multiply
    87,007.31x = 130,378.11 × 64,712.87
  4. Step 4: Simplify right side
    87,007.31x = 8,437,141,031.39
  5. Step 5: Solve for x
    x = 8,437,141,031.39/87,007.31
  6. Step 6: Final answer
    x = 96,970.49

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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.