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Finding the Fourth Proportional to 87,000.62, 120,024.88 and 56,775.06

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Solution

The fourth proportional to 87,000.62, 120,024.88 and 56,775.06 is: 78,326.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,000.62 : 120,024.88 = 56,775.06 : x
  2. Step 2: Convert to fraction form
    87,000.62/120,024.88 = 56,775.06/x
  3. Step 3: Cross multiply
    87,000.62x = 120,024.88 × 56,775.06
  4. Step 4: Simplify right side
    87,000.62x = 6,814,419,621.56
  5. Step 5: Solve for x
    x = 6,814,419,621.56/87,000.62
  6. Step 6: Final answer
    x = 78,326.11

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1.5x scale

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.