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Finding the Fourth Proportional to 268,266.90, 402,400.35 and 81,287.70

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Solution

The fourth proportional to 268,266.90, 402,400.35 and 81,287.70 is: 121,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,266.90 : 402,400.35 = 81,287.70 : x
  2. Step 2: Convert to fraction form
    268,266.90/402,400.35 = 81,287.70/x
  3. Step 3: Cross multiply
    268,266.90x = 402,400.35 × 81,287.70
  4. Step 4: Simplify right side
    268,266.90x = 32,710,198,930.70
  5. Step 5: Solve for x
    x = 32,710,198,930.70/268,266.90
  6. Step 6: Final answer
    x = 121,931.55

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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.