Home / 78,439.59-117,659.39-31,725.27

Finding the Fourth Proportional to 78,439.59, 117,659.39 and 31,725.27

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Solution

The fourth proportional to 78,439.59, 117,659.39 and 31,725.27 is: 47,587.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.59 : 117,659.39 = 31,725.27 : x
  2. Step 2: Convert to fraction form
    78,439.59/117,659.39 = 31,725.27/x
  3. Step 3: Cross multiply
    78,439.59x = 117,659.39 × 31,725.27
  4. Step 4: Simplify right side
    78,439.59x = 3,732,775,757.16
  5. Step 5: Solve for x
    x = 3,732,775,757.16/78,439.59
  6. Step 6: Final answer
    x = 47,587.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.