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Finding the Fourth Proportional to 71,739, 98,999.35 and 39,475.58

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Solution

The fourth proportional to 71,739, 98,999.35 and 39,475.58 is: 54,476.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,739 : 98,999.35 = 39,475.58 : x
  2. Step 2: Convert to fraction form
    71,739/98,999.35 = 39,475.58/x
  3. Step 3: Cross multiply
    71,739x = 98,999.35 × 39,475.58
  4. Step 4: Simplify right side
    71,739x = 3,908,056,760.87
  5. Step 5: Solve for x
    x = 3,908,056,760.87/71,739
  6. Step 6: Final answer
    x = 54,476.04

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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.