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Finding the Fourth Proportional to 72,788.66, 100,449.89 and 40,957.56

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Solution

The fourth proportional to 72,788.66, 100,449.89 and 40,957.56 is: 56,522.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,788.66 : 100,449.89 = 40,957.56 : x
  2. Step 2: Convert to fraction form
    72,788.66/100,449.89 = 40,957.56/x
  3. Step 3: Cross multiply
    72,788.66x = 100,449.89 × 40,957.56
  4. Step 4: Simplify right side
    72,788.66x = 4,114,182,191.88
  5. Step 5: Solve for x
    x = 4,114,182,191.88/72,788.66
  6. Step 6: Final answer
    x = 56,522.30

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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.