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Finding the Fourth Proportional to 78,649.99, 117,876.57 and 61,944.04

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Solution

The fourth proportional to 78,649.99, 117,876.57 and 61,944.04 is: 92,838.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,649.99 : 117,876.57 = 61,944.04 : x
  2. Step 2: Convert to fraction form
    78,649.99/117,876.57 = 61,944.04/x
  3. Step 3: Cross multiply
    78,649.99x = 117,876.57 × 61,944.04
  4. Step 4: Simplify right side
    78,649.99x = 7,301,750,882.20
  5. Step 5: Solve for x
    x = 7,301,750,882.20/78,649.99
  6. Step 6: Final answer
    x = 92,838.55

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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.