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Finding the Fourth Proportional to 78,843.36, 108,732.80 and 50,543.52

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Solution

The fourth proportional to 78,843.36, 108,732.80 and 50,543.52 is: 69,704.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,843.36 : 108,732.80 = 50,543.52 : x
  2. Step 2: Convert to fraction form
    78,843.36/108,732.80 = 50,543.52/x
  3. Step 3: Cross multiply
    78,843.36x = 108,732.80 × 50,543.52
  4. Step 4: Simplify right side
    78,843.36x = 5,495,738,451.46
  5. Step 5: Solve for x
    x = 5,495,738,451.46/78,843.36
  6. Step 6: Final answer
    x = 69,704.52

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1.5x scale

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.