Home / 78,478.97-117,715.84-34,105.76

Finding the Fourth Proportional to 78,478.97, 117,715.84 and 34,105.76

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Solution

The fourth proportional to 78,478.97, 117,715.84 and 34,105.76 is: 51,157.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,478.97 : 117,715.84 = 34,105.76 : x
  2. Step 2: Convert to fraction form
    78,478.97/117,715.84 = 34,105.76/x
  3. Step 3: Cross multiply
    78,478.97x = 117,715.84 × 34,105.76
  4. Step 4: Simplify right side
    78,478.97x = 4,014,788,567.10
  5. Step 5: Solve for x
    x = 4,014,788,567.10/78,478.97
  6. Step 6: Final answer
    x = 51,157.51

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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.