Home / 78,677.11-117,953.70-39,213.91

Finding the Fourth Proportional to 78,677.11, 117,953.70 and 39,213.91

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Solution

The fourth proportional to 78,677.11, 117,953.70 and 39,213.91 is: 58,789.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,677.11 : 117,953.70 = 39,213.91 : x
  2. Step 2: Convert to fraction form
    78,677.11/117,953.70 = 39,213.91/x
  3. Step 3: Cross multiply
    78,677.11x = 117,953.70 × 39,213.91
  4. Step 4: Simplify right side
    78,677.11x = 4,625,425,775.97
  5. Step 5: Solve for x
    x = 4,625,425,775.97/78,677.11
  6. Step 6: Final answer
    x = 58,789.98

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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.