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Finding the Fourth Proportional to 87,311.30, 130,772.55 and 75,647.30

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Solution

The fourth proportional to 87,311.30, 130,772.55 and 75,647.30 is: 113,302.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311.30 : 130,772.55 = 75,647.30 : x
  2. Step 2: Convert to fraction form
    87,311.30/130,772.55 = 75,647.30/x
  3. Step 3: Cross multiply
    87,311.30x = 130,772.55 × 75,647.30
  4. Step 4: Simplify right side
    87,311.30x = 9,892,590,321.62
  5. Step 5: Solve for x
    x = 9,892,590,321.62/87,311.30
  6. Step 6: Final answer
    x = 113,302.52

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1.5x scale

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.