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Finding the Fourth Proportional to 98,748.80, 148,123.20 and 79,065.80

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Solution

The fourth proportional to 98,748.80, 148,123.20 and 79,065.80 is: 118,598.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,748.80 : 148,123.20 = 79,065.80 : x
  2. Step 2: Convert to fraction form
    98,748.80/148,123.20 = 79,065.80/x
  3. Step 3: Cross multiply
    98,748.80x = 148,123.20 × 79,065.80
  4. Step 4: Simplify right side
    98,748.80x = 11,711,479,306.56
  5. Step 5: Solve for x
    x = 11,711,479,306.56/98,748.80
  6. Step 6: Final answer
    x = 118,598.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.