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Finding the Fourth Proportional to 229,358.76, 316,512.90 and 128,756.04

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Solution

The fourth proportional to 229,358.76, 316,512.90 and 128,756.04 is: 177,682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,358.76 : 316,512.90 = 128,756.04 : x
  2. Step 2: Convert to fraction form
    229,358.76/316,512.90 = 128,756.04/x
  3. Step 3: Cross multiply
    229,358.76x = 316,512.90 × 128,756.04
  4. Step 4: Simplify right side
    229,358.76x = 40,752,947,612.92
  5. Step 5: Solve for x
    x = 40,752,947,612.92/229,358.76
  6. Step 6: Final answer
    x = 177,682.11

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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.