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Finding the Fourth Proportional to 230,191.52, 317,644.08 and 128,209.28

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Solution

The fourth proportional to 230,191.52, 317,644.08 and 128,209.28 is: 176,917.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,191.52 : 317,644.08 = 128,209.28 : x
  2. Step 2: Convert to fraction form
    230,191.52/317,644.08 = 128,209.28/x
  3. Step 3: Cross multiply
    230,191.52x = 317,644.08 × 128,209.28
  4. Step 4: Simplify right side
    230,191.52x = 40,724,918,793.06
  5. Step 5: Solve for x
    x = 40,724,918,793.06/230,191.52
  6. Step 6: Final answer
    x = 176,917.55

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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.