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Finding the Fourth Proportional to 73,512.38, 101,447.08 and 39,978.38

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Solution

The fourth proportional to 73,512.38, 101,447.08 and 39,978.38 is: 55,170.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,512.38 : 101,447.08 = 39,978.38 : x
  2. Step 2: Convert to fraction form
    73,512.38/101,447.08 = 39,978.38/x
  3. Step 3: Cross multiply
    73,512.38x = 101,447.08 × 39,978.38
  4. Step 4: Simplify right side
    73,512.38x = 4,055,689,406.90
  5. Step 5: Solve for x
    x = 4,055,689,406.90/73,512.38
  6. Step 6: Final answer
    x = 55,170.16

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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.