Home / 87,146.90-120,372.34-71,888.74

Finding the Fourth Proportional to 87,146.90, 120,372.34 and 71,888.74

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Solution

The fourth proportional to 87,146.90, 120,372.34 and 71,888.74 is: 99,296.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,146.90 : 120,372.34 = 71,888.74 : x
  2. Step 2: Convert to fraction form
    87,146.90/120,372.34 = 71,888.74/x
  3. Step 3: Cross multiply
    87,146.90x = 120,372.34 × 71,888.74
  4. Step 4: Simplify right side
    87,146.90x = 8,653,415,305.40
  5. Step 5: Solve for x
    x = 8,653,415,305.40/87,146.90
  6. Step 6: Final answer
    x = 99,296.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.