Home / 71,439.88-98,586.56-39,608.78

Finding the Fourth Proportional to 71,439.88, 98,586.56 and 39,608.78

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Solution

The fourth proportional to 71,439.88, 98,586.56 and 39,608.78 is: 54,659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,439.88 : 98,586.56 = 39,608.78 : x
  2. Step 2: Convert to fraction form
    71,439.88/98,586.56 = 39,608.78/x
  3. Step 3: Cross multiply
    71,439.88x = 98,586.56 × 39,608.78
  4. Step 4: Simplify right side
    71,439.88x = 3,904,893,366.00
  5. Step 5: Solve for x
    x = 3,904,893,366.00/71,439.88
  6. Step 6: Final answer
    x = 54,659.85

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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.