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Finding the Fourth Proportional to 225,888.13, 311,720.01 and 129,085.84

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Solution

The fourth proportional to 225,888.13, 311,720.01 and 129,085.84 is: 178,135.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,888.13 : 311,720.01 = 129,085.84 : x
  2. Step 2: Convert to fraction form
    225,888.13/311,720.01 = 129,085.84/x
  3. Step 3: Cross multiply
    225,888.13x = 311,720.01 × 129,085.84
  4. Step 4: Simplify right side
    225,888.13x = 40,238,639,335.66
  5. Step 5: Solve for x
    x = 40,238,639,335.66/225,888.13
  6. Step 6: Final answer
    x = 178,135.25

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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.