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Finding the Fourth Proportional to 148,992.40, 205,606.48 and 81,010.72

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Solution

The fourth proportional to 148,992.40, 205,606.48 and 81,010.72 is: 111,793.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,992.40 : 205,606.48 = 81,010.72 : x
  2. Step 2: Convert to fraction form
    148,992.40/205,606.48 = 81,010.72/x
  3. Step 3: Cross multiply
    148,992.40x = 205,606.48 × 81,010.72
  4. Step 4: Simplify right side
    148,992.40x = 16,656,328,981.47
  5. Step 5: Solve for x
    x = 16,656,328,981.47/148,992.40
  6. Step 6: Final answer
    x = 111,793.15

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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.