Home / 78,517.19-108,343.89-53,078.90

Finding the Fourth Proportional to 78,517.19, 108,343.89 and 53,078.90

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Solution

The fourth proportional to 78,517.19, 108,343.89 and 53,078.90 is: 73,242.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517.19 : 108,343.89 = 53,078.90 : x
  2. Step 2: Convert to fraction form
    78,517.19/108,343.89 = 53,078.90/x
  3. Step 3: Cross multiply
    78,517.19x = 108,343.89 × 53,078.90
  4. Step 4: Simplify right side
    78,517.19x = 5,750,774,502.92
  5. Step 5: Solve for x
    x = 5,750,774,502.92/78,517.19
  6. Step 6: Final answer
    x = 73,242.24

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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.