Home / 87,639.60-131,459.40-66,644.40

Finding the Fourth Proportional to 87,639.60, 131,459.40 and 66,644.40

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Solution

The fourth proportional to 87,639.60, 131,459.40 and 66,644.40 is: 99,966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,639.60 : 131,459.40 = 66,644.40 : x
  2. Step 2: Convert to fraction form
    87,639.60/131,459.40 = 66,644.40/x
  3. Step 3: Cross multiply
    87,639.60x = 131,459.40 × 66,644.40
  4. Step 4: Simplify right side
    87,639.60x = 8,761,032,837.36
  5. Step 5: Solve for x
    x = 8,761,032,837.36/87,639.60
  6. Step 6: Final answer
    x = 99,966.60

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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.