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Finding the Fourth Proportional to 72,741.78, 100,410.84 and 47,591.28

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Solution

The fourth proportional to 72,741.78, 100,410.84 and 47,591.28 is: 65,693.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,741.78 : 100,410.84 = 47,591.28 : x
  2. Step 2: Convert to fraction form
    72,741.78/100,410.84 = 47,591.28/x
  3. Step 3: Cross multiply
    72,741.78x = 100,410.84 × 47,591.28
  4. Step 4: Simplify right side
    72,741.78x = 4,778,680,401.48
  5. Step 5: Solve for x
    x = 4,778,680,401.48/72,741.78
  6. Step 6: Final answer
    x = 65,693.75

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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.