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Finding the Fourth Proportional to 229,209.77, 316,314.66 and 128,607.77

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Solution

The fourth proportional to 229,209.77, 316,314.66 and 128,607.77 is: 177,481.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,209.77 : 316,314.66 = 128,607.77 : x
  2. Step 2: Convert to fraction form
    229,209.77/316,314.66 = 128,607.77/x
  3. Step 3: Cross multiply
    229,209.77x = 316,314.66 × 128,607.77
  4. Step 4: Simplify right side
    229,209.77x = 40,680,523,040.91
  5. Step 5: Solve for x
    x = 40,680,523,040.91/229,209.77
  6. Step 6: Final answer
    x = 177,481.63

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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.