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Finding the Fourth Proportional to 229,357.76, 316,511.52 and 128,755.04

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Solution

The fourth proportional to 229,357.76, 316,511.52 and 128,755.04 is: 177,680.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,357.76 : 316,511.52 = 128,755.04 : x
  2. Step 2: Convert to fraction form
    229,357.76/316,511.52 = 128,755.04/x
  3. Step 3: Cross multiply
    229,357.76x = 316,511.52 × 128,755.04
  4. Step 4: Simplify right side
    229,357.76x = 40,752,453,418.06
  5. Step 5: Solve for x
    x = 40,752,453,418.06/229,357.76
  6. Step 6: Final answer
    x = 177,680.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.