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Finding the Fourth Proportional to 154,620.80, 231,931.20 and 99,324.80

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Solution

The fourth proportional to 154,620.80, 231,931.20 and 99,324.80 is: 148,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,620.80 : 231,931.20 = 99,324.80 : x
  2. Step 2: Convert to fraction form
    154,620.80/231,931.20 = 99,324.80/x
  3. Step 3: Cross multiply
    154,620.80x = 231,931.20 × 99,324.80
  4. Step 4: Simplify right side
    154,620.80x = 23,036,520,053.76
  5. Step 5: Solve for x
    x = 23,036,520,053.76/154,620.80
  6. Step 6: Final answer
    x = 148,987.20

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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.