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Finding the Fourth Proportional to 117,266.40, 175,640.40 and 90,763.20

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Solution

The fourth proportional to 117,266.40, 175,640.40 and 90,763.20 is: 135,944.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,266.40 : 175,640.40 = 90,763.20 : x
  2. Step 2: Convert to fraction form
    117,266.40/175,640.40 = 90,763.20/x
  3. Step 3: Cross multiply
    117,266.40x = 175,640.40 × 90,763.20
  4. Step 4: Simplify right side
    117,266.40x = 15,941,684,753.28
  5. Step 5: Solve for x
    x = 15,941,684,753.28/117,266.40
  6. Step 6: Final answer
    x = 135,944.18

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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.