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Finding the Fourth Proportional to 225,719.45, 338,690.12 and 90,778.13

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Solution

The fourth proportional to 225,719.45, 338,690.12 and 90,778.13 is: 136,211.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,719.45 : 338,690.12 = 90,778.13 : x
  2. Step 2: Convert to fraction form
    225,719.45/338,690.12 = 90,778.13/x
  3. Step 3: Cross multiply
    225,719.45x = 338,690.12 × 90,778.13
  4. Step 4: Simplify right side
    225,719.45x = 30,745,657,409.24
  5. Step 5: Solve for x
    x = 30,745,657,409.24/225,719.45
  6. Step 6: Final answer
    x = 136,211.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.