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Finding the Fourth Proportional to 172,407.67, 237,918.89 and 99,813.62

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Solution

The fourth proportional to 172,407.67, 237,918.89 and 99,813.62 is: 137,740.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,407.67 : 237,918.89 = 99,813.62 : x
  2. Step 2: Convert to fraction form
    172,407.67/237,918.89 = 99,813.62/x
  3. Step 3: Cross multiply
    172,407.67x = 237,918.89 × 99,813.62
  4. Step 4: Simplify right side
    172,407.67x = 23,747,546,521.61
  5. Step 5: Solve for x
    x = 23,747,546,521.61/172,407.67
  6. Step 6: Final answer
    x = 137,740.66

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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.