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Finding the Fourth Proportional to 175,280.90, 262,921.35 and 128,279.30

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Solution

The fourth proportional to 175,280.90, 262,921.35 and 128,279.30 is: 192,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    175,280.90 : 262,921.35 = 128,279.30 : x
  2. Step 2: Convert to fraction form
    175,280.90/262,921.35 = 128,279.30/x
  3. Step 3: Cross multiply
    175,280.90x = 262,921.35 × 128,279.30
  4. Step 4: Simplify right side
    175,280.90x = 33,727,366,733.06
  5. Step 5: Solve for x
    x = 33,727,366,733.06/175,280.90
  6. Step 6: Final answer
    x = 192,418.95

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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.