Home / 78,478.39-117,714.98-34,105.19

Finding the Fourth Proportional to 78,478.39, 117,714.98 and 34,105.19

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Solution

The fourth proportional to 78,478.39, 117,714.98 and 34,105.19 is: 51,156.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,478.39 : 117,714.98 = 34,105.19 : x
  2. Step 2: Convert to fraction form
    78,478.39/117,714.98 = 34,105.19/x
  3. Step 3: Cross multiply
    78,478.39x = 117,714.98 × 34,105.19
  4. Step 4: Simplify right side
    78,478.39x = 4,014,691,696.87
  5. Step 5: Solve for x
    x = 4,014,691,696.87/78,478.39
  6. Step 6: Final answer
    x = 51,156.65

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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.