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Finding the Fourth Proportional to 259,862.72, 389,830.98 and 79,963.04

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Solution

The fourth proportional to 259,862.72, 389,830.98 and 79,963.04 is: 119,955.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,862.72 : 389,830.98 = 79,963.04 : x
  2. Step 2: Convert to fraction form
    259,862.72/389,830.98 = 79,963.04/x
  3. Step 3: Cross multiply
    259,862.72x = 389,830.98 × 79,963.04
  4. Step 4: Simplify right side
    259,862.72x = 31,172,070,246.98
  5. Step 5: Solve for x
    x = 31,172,070,246.98/259,862.72
  6. Step 6: Final answer
    x = 119,955.91

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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.