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Finding the Fourth Proportional to 172,805.64, 238,330.82 and 145,103.40

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Solution

The fourth proportional to 172,805.64, 238,330.82 and 145,103.40 is: 200,124.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,805.64 : 238,330.82 = 145,103.40 : x
  2. Step 2: Convert to fraction form
    172,805.64/238,330.82 = 145,103.40/x
  3. Step 3: Cross multiply
    172,805.64x = 238,330.82 × 145,103.40
  4. Step 4: Simplify right side
    172,805.64x = 34,582,612,306.79
  5. Step 5: Solve for x
    x = 34,582,612,306.79/172,805.64
  6. Step 6: Final answer
    x = 200,124.33

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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.