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Finding the Fourth Proportional to 78,751.17, 117,995.28 and 55,335.69

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Solution

The fourth proportional to 78,751.17, 117,995.28 and 55,335.69 is: 82,911.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,751.17 : 117,995.28 = 55,335.69 : x
  2. Step 2: Convert to fraction form
    78,751.17/117,995.28 = 55,335.69/x
  3. Step 3: Cross multiply
    78,751.17x = 117,995.28 × 55,335.69
  4. Step 4: Simplify right side
    78,751.17x = 6,529,350,235.54
  5. Step 5: Solve for x
    x = 6,529,350,235.54/78,751.17
  6. Step 6: Final answer
    x = 82,911.15

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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.