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Finding the Fourth Proportional to 221,089.92, 305,112.25 and 125,612.79

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Solution

The fourth proportional to 221,089.92, 305,112.25 and 125,612.79 is: 173,350.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,089.92 : 305,112.25 = 125,612.79 : x
  2. Step 2: Convert to fraction form
    221,089.92/305,112.25 = 125,612.79/x
  3. Step 3: Cross multiply
    221,089.92x = 305,112.25 × 125,612.79
  4. Step 4: Simplify right side
    221,089.92x = 38,326,000,985.68
  5. Step 5: Solve for x
    x = 38,326,000,985.68/221,089.92
  6. Step 6: Final answer
    x = 173,350.29

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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.