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Finding the Fourth Proportional to 268,296.65, 402,463.60 and 90,743.63

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Solution

The fourth proportional to 268,296.65, 402,463.60 and 90,743.63 is: 136,121.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,296.65 : 402,463.60 = 90,743.63 : x
  2. Step 2: Convert to fraction form
    268,296.65/402,463.60 = 90,743.63/x
  3. Step 3: Cross multiply
    268,296.65x = 402,463.60 × 90,743.63
  4. Step 4: Simplify right side
    268,296.65x = 36,521,008,786.17
  5. Step 5: Solve for x
    x = 36,521,008,786.17/268,296.65
  6. Step 6: Final answer
    x = 136,121.75

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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.