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Finding the Fourth Proportional to 71,548.92, 98,738.16 and 39,720.84

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Solution

The fourth proportional to 71,548.92, 98,738.16 and 39,720.84 is: 54,815.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,548.92 : 98,738.16 = 39,720.84 : x
  2. Step 2: Convert to fraction form
    71,548.92/98,738.16 = 39,720.84/x
  3. Step 3: Cross multiply
    71,548.92x = 98,738.16 × 39,720.84
  4. Step 4: Simplify right side
    71,548.92x = 3,921,962,655.25
  5. Step 5: Solve for x
    x = 3,921,962,655.25/71,548.92
  6. Step 6: Final answer
    x = 54,815.12

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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.