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Finding the Fourth Proportional to 225,680.40, 311,424.57 and 123,687.84

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Solution

The fourth proportional to 225,680.40, 311,424.57 and 123,687.84 is: 170,681.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,680.40 : 311,424.57 = 123,687.84 : x
  2. Step 2: Convert to fraction form
    225,680.40/311,424.57 = 123,687.84/x
  3. Step 3: Cross multiply
    225,680.40x = 311,424.57 × 123,687.84
  4. Step 4: Simplify right side
    225,680.40x = 38,519,432,386.23
  5. Step 5: Solve for x
    x = 38,519,432,386.23/225,680.40
  6. Step 6: Final answer
    x = 170,681.34

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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.