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Finding the Fourth Proportional to 72,161.04, 99,581.80 and 40,329.68

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Solution

The fourth proportional to 72,161.04, 99,581.80 and 40,329.68 is: 55,654.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,161.04 : 99,581.80 = 40,329.68 : x
  2. Step 2: Convert to fraction form
    72,161.04/99,581.80 = 40,329.68/x
  3. Step 3: Cross multiply
    72,161.04x = 99,581.80 × 40,329.68
  4. Step 4: Simplify right side
    72,161.04x = 4,016,102,127.82
  5. Step 5: Solve for x
    x = 4,016,102,127.82/72,161.04
  6. Step 6: Final answer
    x = 55,654.72

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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.