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Finding the Fourth Proportional to 72,490.97, 100,042.98 and 40,231.67

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Solution

The fourth proportional to 72,490.97, 100,042.98 and 40,231.67 is: 55,522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,490.97 : 100,042.98 = 40,231.67 : x
  2. Step 2: Convert to fraction form
    72,490.97/100,042.98 = 40,231.67/x
  3. Step 3: Cross multiply
    72,490.97x = 100,042.98 × 40,231.67
  4. Step 4: Simplify right side
    72,490.97x = 4,024,895,656.96
  5. Step 5: Solve for x
    x = 4,024,895,656.96/72,490.97
  6. Step 6: Final answer
    x = 55,522.72

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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.