Home / 78,007.19-107,649.84-42,197.11

Finding the Fourth Proportional to 78,007.19, 107,649.84 and 42,197.11

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Solution

The fourth proportional to 78,007.19, 107,649.84 and 42,197.11 is: 58,231.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,007.19 : 107,649.84 = 42,197.11 : x
  2. Step 2: Convert to fraction form
    78,007.19/107,649.84 = 42,197.11/x
  3. Step 3: Cross multiply
    78,007.19x = 107,649.84 × 42,197.11
  4. Step 4: Simplify right side
    78,007.19x = 4,542,512,139.96
  5. Step 5: Solve for x
    x = 4,542,512,139.96/78,007.19
  6. Step 6: Final answer
    x = 58,231.97

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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.