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Finding the Fourth Proportional to 131,574, 181,572.12 and 71,958

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Solution

The fourth proportional to 131,574, 181,572.12 and 71,958 is: 99,302.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,574 : 181,572.12 = 71,958 : x
  2. Step 2: Convert to fraction form
    131,574/181,572.12 = 71,958/x
  3. Step 3: Cross multiply
    131,574x = 181,572.12 × 71,958
  4. Step 4: Simplify right side
    131,574x = 13,065,566,610.96
  5. Step 5: Solve for x
    x = 13,065,566,610.96/131,574
  6. Step 6: Final answer
    x = 99,302.04

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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.