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Finding the Fourth Proportional to 129,618.80, 194,428.20 and 120,870.80

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Solution

The fourth proportional to 129,618.80, 194,428.20 and 120,870.80 is: 181,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,618.80 : 194,428.20 = 120,870.80 : x
  2. Step 2: Convert to fraction form
    129,618.80/194,428.20 = 120,870.80/x
  3. Step 3: Cross multiply
    129,618.80x = 194,428.20 × 120,870.80
  4. Step 4: Simplify right side
    129,618.80x = 23,500,692,076.56
  5. Step 5: Solve for x
    x = 23,500,692,076.56/129,618.80
  6. Step 6: Final answer
    x = 181,306.20

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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.