Home / 78,391.02-108,138.13-49,659.99

Finding the Fourth Proportional to 78,391.02, 108,138.13 and 49,659.99

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Solution

The fourth proportional to 78,391.02, 108,138.13 and 49,659.99 is: 68,504.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,391.02 : 108,138.13 = 49,659.99 : x
  2. Step 2: Convert to fraction form
    78,391.02/108,138.13 = 49,659.99/x
  3. Step 3: Cross multiply
    78,391.02x = 108,138.13 × 49,659.99
  4. Step 4: Simplify right side
    78,391.02x = 5,370,138,454.42
  5. Step 5: Solve for x
    x = 5,370,138,454.42/78,391.02
  6. Step 6: Final answer
    x = 68,504.51

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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.