Home / 87,654.88-120,972.20-51,856.40

Finding the Fourth Proportional to 87,654.88, 120,972.20 and 51,856.40

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Solution

The fourth proportional to 87,654.88, 120,972.20 and 51,856.40 is: 71,566.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,654.88 : 120,972.20 = 51,856.40 : x
  2. Step 2: Convert to fraction form
    87,654.88/120,972.20 = 51,856.40/x
  3. Step 3: Cross multiply
    87,654.88x = 120,972.20 × 51,856.40
  4. Step 4: Simplify right side
    87,654.88x = 6,273,182,792.08
  5. Step 5: Solve for x
    x = 6,273,182,792.08/87,654.88
  6. Step 6: Final answer
    x = 71,566.84

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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.