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Finding the Fourth Proportional to 129,787.40, 194,373.90 and 88,008.20

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Solution

The fourth proportional to 129,787.40, 194,373.90 and 88,008.20 is: 131,803.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787.40 : 194,373.90 = 88,008.20 : x
  2. Step 2: Convert to fraction form
    129,787.40/194,373.90 = 88,008.20/x
  3. Step 3: Cross multiply
    129,787.40x = 194,373.90 × 88,008.20
  4. Step 4: Simplify right side
    129,787.40x = 17,106,497,065.98
  5. Step 5: Solve for x
    x = 17,106,497,065.98/129,787.40
  6. Step 6: Final answer
    x = 131,803.99

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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.