Home / 78,632.55-117,378.73-72,778.92

Finding the Fourth Proportional to 78,632.55, 117,378.73 and 72,778.92

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Solution

The fourth proportional to 78,632.55, 117,378.73 and 72,778.92 is: 108,640.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,632.55 : 117,378.73 = 72,778.92 : x
  2. Step 2: Convert to fraction form
    78,632.55/117,378.73 = 72,778.92/x
  3. Step 3: Cross multiply
    78,632.55x = 117,378.73 × 72,778.92
  4. Step 4: Simplify right side
    78,632.55x = 8,542,696,441.79
  5. Step 5: Solve for x
    x = 8,542,696,441.79/78,632.55
  6. Step 6: Final answer
    x = 108,640.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.