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Finding the Fourth Proportional to 72,161.79, 99,518.78 and 45,306.80

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Solution

The fourth proportional to 72,161.79, 99,518.78 and 45,306.80 is: 62,482.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,161.79 : 99,518.78 = 45,306.80 : x
  2. Step 2: Convert to fraction form
    72,161.79/99,518.78 = 45,306.80/x
  3. Step 3: Cross multiply
    72,161.79x = 99,518.78 × 45,306.80
  4. Step 4: Simplify right side
    72,161.79x = 4,508,876,737.58
  5. Step 5: Solve for x
    x = 4,508,876,737.58/72,161.79
  6. Step 6: Final answer
    x = 62,482.88

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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.