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Finding the Fourth Proportional to 90,191.92, 124,514.94 and 54,391

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Solution

The fourth proportional to 90,191.92, 124,514.94 and 54,391 is: 75,089.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,191.92 : 124,514.94 = 54,391 : x
  2. Step 2: Convert to fraction form
    90,191.92/124,514.94 = 54,391/x
  3. Step 3: Cross multiply
    90,191.92x = 124,514.94 × 54,391
  4. Step 4: Simplify right side
    90,191.92x = 6,772,492,101.54
  5. Step 5: Solve for x
    x = 6,772,492,101.54/90,191.92
  6. Step 6: Final answer
    x = 75,089.79

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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.