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Finding the Fourth Proportional to 78,454.40, 108,291.84 and 50,160.20

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Solution

The fourth proportional to 78,454.40, 108,291.84 and 50,160.20 is: 69,236.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,454.40 : 108,291.84 = 50,160.20 : x
  2. Step 2: Convert to fraction form
    78,454.40/108,291.84 = 50,160.20/x
  3. Step 3: Cross multiply
    78,454.40x = 108,291.84 × 50,160.20
  4. Step 4: Simplify right side
    78,454.40x = 5,431,940,352.77
  5. Step 5: Solve for x
    x = 5,431,940,352.77/78,454.40
  6. Step 6: Final answer
    x = 69,236.91

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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.