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Finding the Fourth Proportional to 225,387, 311,036.22 and 124,787.16

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Solution

The fourth proportional to 225,387, 311,036.22 and 124,787.16 is: 172,207.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,387 : 311,036.22 = 124,787.16 : x
  2. Step 2: Convert to fraction form
    225,387/311,036.22 = 124,787.16/x
  3. Step 3: Cross multiply
    225,387x = 311,036.22 × 124,787.16
  4. Step 4: Simplify right side
    225,387x = 38,813,326,550.94
  5. Step 5: Solve for x
    x = 38,813,326,550.94/225,387
  6. Step 6: Final answer
    x = 172,207.48

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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.