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Finding the Fourth Proportional to 268,304.76, 402,515.22 and 81,330.36

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Solution

The fourth proportional to 268,304.76, 402,515.22 and 81,330.36 is: 122,013.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,304.76 : 402,515.22 = 81,330.36 : x
  2. Step 2: Convert to fraction form
    268,304.76/402,515.22 = 81,330.36/x
  3. Step 3: Cross multiply
    268,304.76x = 402,515.22 × 81,330.36
  4. Step 4: Simplify right side
    268,304.76x = 32,736,707,748.08
  5. Step 5: Solve for x
    x = 32,736,707,748.08/268,304.76
  6. Step 6: Final answer
    x = 122,013.15

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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.