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Finding the Fourth Proportional to 201,990.74, 278,747.12 and 111,348.18

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Solution

The fourth proportional to 201,990.74, 278,747.12 and 111,348.18 is: 153,660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,990.74 : 278,747.12 = 111,348.18 : x
  2. Step 2: Convert to fraction form
    201,990.74/278,747.12 = 111,348.18/x
  3. Step 3: Cross multiply
    201,990.74x = 278,747.12 × 111,348.18
  4. Step 4: Simplify right side
    201,990.74x = 31,037,983,935.50
  5. Step 5: Solve for x
    x = 31,037,983,935.50/201,990.74
  6. Step 6: Final answer
    x = 153,660.43

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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.