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Finding the Fourth Proportional to 99,396, 137,166.48 and 54,686.88

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Solution

The fourth proportional to 99,396, 137,166.48 and 54,686.88 is: 75,467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,396 : 137,166.48 = 54,686.88 : x
  2. Step 2: Convert to fraction form
    99,396/137,166.48 = 54,686.88/x
  3. Step 3: Cross multiply
    99,396x = 137,166.48 × 54,686.88
  4. Step 4: Simplify right side
    99,396x = 7,501,206,831.78
  5. Step 5: Solve for x
    x = 7,501,206,831.78/99,396
  6. Step 6: Final answer
    x = 75,467.89

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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.