Home / 87,499.24-131,126.79-66,134.40

Finding the Fourth Proportional to 87,499.24, 131,126.79 and 66,134.40

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Solution

The fourth proportional to 87,499.24, 131,126.79 and 66,134.40 is: 99,109.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,499.24 : 131,126.79 = 66,134.40 : x
  2. Step 2: Convert to fraction form
    87,499.24/131,126.79 = 66,134.40/x
  3. Step 3: Cross multiply
    87,499.24x = 131,126.79 × 66,134.40
  4. Step 4: Simplify right side
    87,499.24x = 8,671,991,580.58
  5. Step 5: Solve for x
    x = 8,671,991,580.58/87,499.24
  6. Step 6: Final answer
    x = 99,109.34

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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.