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Finding the Fourth Proportional to 229,209.75, 316,311.89 and 128,607.75

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Solution

The fourth proportional to 229,209.75, 316,311.89 and 128,607.75 is: 177,480.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,209.75 : 316,311.89 = 128,607.75 : x
  2. Step 2: Convert to fraction form
    229,209.75/316,311.89 = 128,607.75/x
  3. Step 3: Cross multiply
    229,209.75x = 316,311.89 × 128,607.75
  4. Step 4: Simplify right side
    229,209.75x = 40,680,159,828.11
  5. Step 5: Solve for x
    x = 40,680,159,828.11/229,209.75
  6. Step 6: Final answer
    x = 177,480.06

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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.