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Finding the Fourth Proportional to 78,665.52, 108,452.24 and 76,219.44

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Solution

The fourth proportional to 78,665.52, 108,452.24 and 76,219.44 is: 105,079.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,665.52 : 108,452.24 = 76,219.44 : x
  2. Step 2: Convert to fraction form
    78,665.52/108,452.24 = 76,219.44/x
  3. Step 3: Cross multiply
    78,665.52x = 108,452.24 × 76,219.44
  4. Step 4: Simplify right side
    78,665.52x = 8,266,168,999.55
  5. Step 5: Solve for x
    x = 8,266,168,999.55/78,665.52
  6. Step 6: Final answer
    x = 105,079.95

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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.