Home / 103,086.11-142,255.39-57,143.82

Finding the Fourth Proportional to 103,086.11, 142,255.39 and 57,143.82

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Solution

The fourth proportional to 103,086.11, 142,255.39 and 57,143.82 is: 78,856.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,086.11 : 142,255.39 = 57,143.82 : x
  2. Step 2: Convert to fraction form
    103,086.11/142,255.39 = 57,143.82/x
  3. Step 3: Cross multiply
    103,086.11x = 142,255.39 × 57,143.82
  4. Step 4: Simplify right side
    103,086.11x = 8,129,016,400.19
  5. Step 5: Solve for x
    x = 8,129,016,400.19/103,086.11
  6. Step 6: Final answer
    x = 78,856.56

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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.