Home / 87,307.20-131,018.40-31,903.20

Finding the Fourth Proportional to 87,307.20, 131,018.40 and 31,903.20

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Solution

The fourth proportional to 87,307.20, 131,018.40 and 31,903.20 is: 47,875.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,307.20 : 131,018.40 = 31,903.20 : x
  2. Step 2: Convert to fraction form
    87,307.20/131,018.40 = 31,903.20/x
  3. Step 3: Cross multiply
    87,307.20x = 131,018.40 × 31,903.20
  4. Step 4: Simplify right side
    87,307.20x = 4,179,906,218.88
  5. Step 5: Solve for x
    x = 4,179,906,218.88/87,307.20
  6. Step 6: Final answer
    x = 47,875.85

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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.