Home / 78,650.28-108,538.68-42,840.33

Finding the Fourth Proportional to 78,650.28, 108,538.68 and 42,840.33

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Solution

The fourth proportional to 78,650.28, 108,538.68 and 42,840.33 is: 59,120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,650.28 : 108,538.68 = 42,840.33 : x
  2. Step 2: Convert to fraction form
    78,650.28/108,538.68 = 42,840.33/x
  3. Step 3: Cross multiply
    78,650.28x = 108,538.68 × 42,840.33
  4. Step 4: Simplify right side
    78,650.28x = 4,649,832,868.96
  5. Step 5: Solve for x
    x = 4,649,832,868.96/78,650.28
  6. Step 6: Final answer
    x = 59,120.36

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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.