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Finding the Fourth Proportional to 88,378.50, 121,942.12 and 50,128.92

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Solution

The fourth proportional to 88,378.50, 121,942.12 and 50,128.92 is: 69,166.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,378.50 : 121,942.12 = 50,128.92 : x
  2. Step 2: Convert to fraction form
    88,378.50/121,942.12 = 50,128.92/x
  3. Step 3: Cross multiply
    88,378.50x = 121,942.12 × 50,128.92
  4. Step 4: Simplify right side
    88,378.50x = 6,112,826,778.11
  5. Step 5: Solve for x
    x = 6,112,826,778.11/88,378.50
  6. Step 6: Final answer
    x = 69,166.45

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Double scale
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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.