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Finding the Fourth Proportional to 207,787.40, 311,681.10 and 124,843.40

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Solution

The fourth proportional to 207,787.40, 311,681.10 and 124,843.40 is: 187,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,787.40 : 311,681.10 = 124,843.40 : x
  2. Step 2: Convert to fraction form
    207,787.40/311,681.10 = 124,843.40/x
  3. Step 3: Cross multiply
    207,787.40x = 311,681.10 × 124,843.40
  4. Step 4: Simplify right side
    207,787.40x = 38,911,328,239.74
  5. Step 5: Solve for x
    x = 38,911,328,239.74/207,787.40
  6. Step 6: Final answer
    x = 187,265.10

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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.