Home / 156,129.96-215,439.84-88,138.56

Finding the Fourth Proportional to 156,129.96, 215,439.84 and 88,138.56

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Solution

The fourth proportional to 156,129.96, 215,439.84 and 88,138.56 is: 121,620.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,129.96 : 215,439.84 = 88,138.56 : x
  2. Step 2: Convert to fraction form
    156,129.96/215,439.84 = 88,138.56/x
  3. Step 3: Cross multiply
    156,129.96x = 215,439.84 × 88,138.56
  4. Step 4: Simplify right side
    156,129.96x = 18,988,557,264.23
  5. Step 5: Solve for x
    x = 18,988,557,264.23/156,129.96
  6. Step 6: Final answer
    x = 121,620.20

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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.