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Finding the Fourth Proportional to 72,226.55, 99,672.91 and 40,393.42

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Solution

The fourth proportional to 72,226.55, 99,672.91 and 40,393.42 is: 55,743.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,226.55 : 99,672.91 = 40,393.42 : x
  2. Step 2: Convert to fraction form
    72,226.55/99,672.91 = 40,393.42/x
  3. Step 3: Cross multiply
    72,226.55x = 99,672.91 × 40,393.42
  4. Step 4: Simplify right side
    72,226.55x = 4,026,129,366.09
  5. Step 5: Solve for x
    x = 4,026,129,366.09/72,226.55
  6. Step 6: Final answer
    x = 55,743.06

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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.