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Finding the Fourth Proportional to 268,578.80, 402,925.80 and 81,609.20

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Solution

The fourth proportional to 268,578.80, 402,925.80 and 81,609.20 is: 122,431.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,578.80 : 402,925.80 = 81,609.20 : x
  2. Step 2: Convert to fraction form
    268,578.80/402,925.80 = 81,609.20/x
  3. Step 3: Cross multiply
    268,578.80x = 402,925.80 × 81,609.20
  4. Step 4: Simplify right side
    268,578.80x = 32,882,452,197.36
  5. Step 5: Solve for x
    x = 32,882,452,197.36/268,578.80
  6. Step 6: Final answer
    x = 122,431.30

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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.