Home / 87,633.40-131,450.10-66,638.20

Finding the Fourth Proportional to 87,633.40, 131,450.10 and 66,638.20

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Solution

The fourth proportional to 87,633.40, 131,450.10 and 66,638.20 is: 99,957.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,633.40 : 131,450.10 = 66,638.20 : x
  2. Step 2: Convert to fraction form
    87,633.40/131,450.10 = 66,638.20/x
  3. Step 3: Cross multiply
    87,633.40x = 131,450.10 × 66,638.20
  4. Step 4: Simplify right side
    87,633.40x = 8,759,598,053.82
  5. Step 5: Solve for x
    x = 8,759,598,053.82/87,633.40
  6. Step 6: Final answer
    x = 99,957.30

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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.