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Finding the Fourth Proportional to 87,226.40, 130,724.40 and 64,864.64

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Solution

The fourth proportional to 87,226.40, 130,724.40 and 64,864.64 is: 97,211.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,226.40 : 130,724.40 = 64,864.64 : x
  2. Step 2: Convert to fraction form
    87,226.40/130,724.40 = 64,864.64/x
  3. Step 3: Cross multiply
    87,226.40x = 130,724.40 × 64,864.64
  4. Step 4: Simplify right side
    87,226.40x = 8,479,391,145.22
  5. Step 5: Solve for x
    x = 8,479,391,145.22/87,226.40
  6. Step 6: Final answer
    x = 97,211.29

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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.