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Finding the Fourth Proportional to 100,658.40, 151,279.20 and 98,908.80

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Solution

The fourth proportional to 100,658.40, 151,279.20 and 98,908.80 is: 148,649.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,658.40 : 151,279.20 = 98,908.80 : x
  2. Step 2: Convert to fraction form
    100,658.40/151,279.20 = 98,908.80/x
  3. Step 3: Cross multiply
    100,658.40x = 151,279.20 × 98,908.80
  4. Step 4: Simplify right side
    100,658.40x = 14,962,844,136.96
  5. Step 5: Solve for x
    x = 14,962,844,136.96/100,658.40
  6. Step 6: Final answer
    x = 148,649.73

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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.