Home / 78,269.12-117,221.09-57,156.87

Finding the Fourth Proportional to 78,269.12, 117,221.09 and 57,156.87

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Solution

The fourth proportional to 78,269.12, 117,221.09 and 57,156.87 is: 85,601.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,269.12 : 117,221.09 = 57,156.87 : x
  2. Step 2: Convert to fraction form
    78,269.12/117,221.09 = 57,156.87/x
  3. Step 3: Cross multiply
    78,269.12x = 117,221.09 × 57,156.87
  4. Step 4: Simplify right side
    78,269.12x = 6,699,990,316.60
  5. Step 5: Solve for x
    x = 6,699,990,316.60/78,269.12
  6. Step 6: Final answer
    x = 85,601.97

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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.