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Finding the Fourth Proportional to 87,017.60, 130,234.80 and 80,019.20

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Solution

The fourth proportional to 87,017.60, 130,234.80 and 80,019.20 is: 119,760.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,017.60 : 130,234.80 = 80,019.20 : x
  2. Step 2: Convert to fraction form
    87,017.60/130,234.80 = 80,019.20/x
  3. Step 3: Cross multiply
    87,017.60x = 130,234.80 × 80,019.20
  4. Step 4: Simplify right side
    87,017.60x = 10,421,284,508.16
  5. Step 5: Solve for x
    x = 10,421,284,508.16/87,017.60
  6. Step 6: Final answer
    x = 119,760.65

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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.