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Finding the Fourth Proportional to 72,446.80, 99,978.66 and 40,616.22

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Solution

The fourth proportional to 72,446.80, 99,978.66 and 40,616.22 is: 56,051.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,446.80 : 99,978.66 = 40,616.22 : x
  2. Step 2: Convert to fraction form
    72,446.80/99,978.66 = 40,616.22/x
  3. Step 3: Cross multiply
    72,446.80x = 99,978.66 × 40,616.22
  4. Step 4: Simplify right side
    72,446.80x = 4,060,755,249.87
  5. Step 5: Solve for x
    x = 4,060,755,249.87/72,446.80
  6. Step 6: Final answer
    x = 56,051.55

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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.