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Finding the Fourth Proportional to 148,648.55, 205,133.96 and 80,663.79

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Solution

The fourth proportional to 148,648.55, 205,133.96 and 80,663.79 is: 111,315.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,648.55 : 205,133.96 = 80,663.79 : x
  2. Step 2: Convert to fraction form
    148,648.55/205,133.96 = 80,663.79/x
  3. Step 3: Cross multiply
    148,648.55x = 205,133.96 × 80,663.79
  4. Step 4: Simplify right side
    148,648.55x = 16,546,882,267.99
  5. Step 5: Solve for x
    x = 16,546,882,267.99/148,648.55
  6. Step 6: Final answer
    x = 111,315.47

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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.