Home / 87,631.28-120,931.08-47,887.28

Finding the Fourth Proportional to 87,631.28, 120,931.08 and 47,887.28

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Solution

The fourth proportional to 87,631.28, 120,931.08 and 47,887.28 is: 66,084.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,631.28 : 120,931.08 = 47,887.28 : x
  2. Step 2: Convert to fraction form
    87,631.28/120,931.08 = 47,887.28/x
  3. Step 3: Cross multiply
    87,631.28x = 120,931.08 × 47,887.28
  4. Step 4: Simplify right side
    87,631.28x = 5,791,060,488.66
  5. Step 5: Solve for x
    x = 5,791,060,488.66/87,631.28
  6. Step 6: Final answer
    x = 66,084.40

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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.