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Finding the Fourth Proportional to 98,743.80, 148,115.70 and 79,060.80

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Solution

The fourth proportional to 98,743.80, 148,115.70 and 79,060.80 is: 118,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,743.80 : 148,115.70 = 79,060.80 : x
  2. Step 2: Convert to fraction form
    98,743.80/148,115.70 = 79,060.80/x
  3. Step 3: Cross multiply
    98,743.80x = 148,115.70 × 79,060.80
  4. Step 4: Simplify right side
    98,743.80x = 11,710,145,734.56
  5. Step 5: Solve for x
    x = 11,710,145,734.56/98,743.80
  6. Step 6: Final answer
    x = 118,591.20

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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.