Home / 82,117.16-123,175.47-19,787.66

Finding the Fourth Proportional to 82,117.16, 123,175.47 and 19,787.66

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Solution

The fourth proportional to 82,117.16, 123,175.47 and 19,787.66 is: 29,681.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,117.16 : 123,175.47 = 19,787.66 : x
  2. Step 2: Convert to fraction form
    82,117.16/123,175.47 = 19,787.66/x
  3. Step 3: Cross multiply
    82,117.16x = 123,175.47 × 19,787.66
  4. Step 4: Simplify right side
    82,117.16x = 2,437,354,129.63
  5. Step 5: Solve for x
    x = 2,437,354,129.63/82,117.16
  6. Step 6: Final answer
    x = 29,681.42

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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.