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Finding the Fourth Proportional to 129,897.93, 179,243.33 and 72,540.44

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Solution

The fourth proportional to 129,897.93, 179,243.33 and 72,540.44 is: 100,096.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,897.93 : 179,243.33 = 72,540.44 : x
  2. Step 2: Convert to fraction form
    129,897.93/179,243.33 = 72,540.44/x
  3. Step 3: Cross multiply
    129,897.93x = 179,243.33 × 72,540.44
  4. Step 4: Simplify right side
    129,897.93x = 13,002,390,854.79
  5. Step 5: Solve for x
    x = 13,002,390,854.79/129,897.93
  6. Step 6: Final answer
    x = 100,096.98

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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.