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Finding the Fourth Proportional to 83,858.15, 125,807.78 and 68,890.57

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Solution

The fourth proportional to 83,858.15, 125,807.78 and 68,890.57 is: 103,352.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,858.15 : 125,807.78 = 68,890.57 : x
  2. Step 2: Convert to fraction form
    83,858.15/125,807.78 = 68,890.57/x
  3. Step 3: Cross multiply
    83,858.15x = 125,807.78 × 68,890.57
  4. Step 4: Simplify right side
    83,858.15x = 8,666,969,532.34
  5. Step 5: Solve for x
    x = 8,666,969,532.34/83,858.15
  6. Step 6: Final answer
    x = 103,352.74

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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.