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Finding the Fourth Proportional to 56,759.88, 78,246.81 and 39,711.30

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Solution

The fourth proportional to 56,759.88, 78,246.81 and 39,711.30 is: 54,744.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,759.88 : 78,246.81 = 39,711.30 : x
  2. Step 2: Convert to fraction form
    56,759.88/78,246.81 = 39,711.30/x
  3. Step 3: Cross multiply
    56,759.88x = 78,246.81 × 39,711.30
  4. Step 4: Simplify right side
    56,759.88x = 3,107,282,545.95
  5. Step 5: Solve for x
    x = 3,107,282,545.95/56,759.88
  6. Step 6: Final answer
    x = 54,744.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.