Home / 87,659.19-120,989.80-53,686.40

Finding the Fourth Proportional to 87,659.19, 120,989.80 and 53,686.40

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Solution

The fourth proportional to 87,659.19, 120,989.80 and 53,686.40 is: 74,099.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,659.19 : 120,989.80 = 53,686.40 : x
  2. Step 2: Convert to fraction form
    87,659.19/120,989.80 = 53,686.40/x
  3. Step 3: Cross multiply
    87,659.19x = 120,989.80 × 53,686.40
  4. Step 4: Simplify right side
    87,659.19x = 6,495,506,260.88
  5. Step 5: Solve for x
    x = 6,495,506,260.88/87,659.19
  6. Step 6: Final answer
    x = 74,099.55

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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.