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Finding the Fourth Proportional to 230,902.32, 318,641.89 and 128,929.38

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Solution

The fourth proportional to 230,902.32, 318,641.89 and 128,929.38 is: 177,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,902.32 : 318,641.89 = 128,929.38 : x
  2. Step 2: Convert to fraction form
    230,902.32/318,641.89 = 128,929.38/x
  3. Step 3: Cross multiply
    230,902.32x = 318,641.89 × 128,929.38
  4. Step 4: Simplify right side
    230,902.32x = 41,082,302,919.26
  5. Step 5: Solve for x
    x = 41,082,302,919.26/230,902.32
  6. Step 6: Final answer
    x = 177,920.70

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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.