Home / 78,765.20-108,696.16-42,955.44

Finding the Fourth Proportional to 78,765.20, 108,696.16 and 42,955.44

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Solution

The fourth proportional to 78,765.20, 108,696.16 and 42,955.44 is: 59,278.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,765.20 : 108,696.16 = 42,955.44 : x
  2. Step 2: Convert to fraction form
    78,765.20/108,696.16 = 42,955.44/x
  3. Step 3: Cross multiply
    78,765.20x = 108,696.16 × 42,955.44
  4. Step 4: Simplify right side
    78,765.20x = 4,669,091,379.11
  5. Step 5: Solve for x
    x = 4,669,091,379.11/78,765.20
  6. Step 6: Final answer
    x = 59,278.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.