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Finding the Fourth Proportional to 268,458.75, 402,690.56 and 81,470.25

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Solution

The fourth proportional to 268,458.75, 402,690.56 and 81,470.25 is: 122,206.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,458.75 : 402,690.56 = 81,470.25 : x
  2. Step 2: Convert to fraction form
    268,458.75/402,690.56 = 81,470.25/x
  3. Step 3: Cross multiply
    268,458.75x = 402,690.56 × 81,470.25
  4. Step 4: Simplify right side
    268,458.75x = 32,807,300,188.49
  5. Step 5: Solve for x
    x = 32,807,300,188.49/268,458.75
  6. Step 6: Final answer
    x = 122,206.11

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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.