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Finding the Fourth Proportional to 268,279.80, 402,273.90 and 90,695.40

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Solution

The fourth proportional to 268,279.80, 402,273.90 and 90,695.40 is: 135,993.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,279.80 : 402,273.90 = 90,695.40 : x
  2. Step 2: Convert to fraction form
    268,279.80/402,273.90 = 90,695.40/x
  3. Step 3: Cross multiply
    268,279.80x = 402,273.90 × 90,695.40
  4. Step 4: Simplify right side
    268,279.80x = 36,484,392,270.06
  5. Step 5: Solve for x
    x = 36,484,392,270.06/268,279.80
  6. Step 6: Final answer
    x = 135,993.81

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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.