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Finding the Fourth Proportional to 72,161.54, 99,518.42 and 45,306.56

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Solution

The fourth proportional to 72,161.54, 99,518.42 and 45,306.56 is: 62,482.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,161.54 : 99,518.42 = 45,306.56 : x
  2. Step 2: Convert to fraction form
    72,161.54/99,518.42 = 45,306.56/x
  3. Step 3: Cross multiply
    72,161.54x = 99,518.42 × 45,306.56
  4. Step 4: Simplify right side
    72,161.54x = 4,508,837,266.84
  5. Step 5: Solve for x
    x = 4,508,837,266.84/72,161.54
  6. Step 6: Final answer
    x = 62,482.55

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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.