Home / 221,100.76-305,120.10-125,612.70

Finding the Fourth Proportional to 221,100.76, 305,120.10 and 125,612.70

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Solution

The fourth proportional to 221,100.76, 305,120.10 and 125,612.70 is: 173,346.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,100.76 : 305,120.10 = 125,612.70 : x
  2. Step 2: Convert to fraction form
    221,100.76/305,120.10 = 125,612.70/x
  3. Step 3: Cross multiply
    221,100.76x = 305,120.10 × 125,612.70
  4. Step 4: Simplify right side
    221,100.76x = 38,326,959,585.27
  5. Step 5: Solve for x
    x = 38,326,959,585.27/221,100.76
  6. Step 6: Final answer
    x = 173,346.12

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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.