Home / 78,286.88-117,434.16-31,533.44

Finding the Fourth Proportional to 78,286.88, 117,434.16 and 31,533.44

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Solution

The fourth proportional to 78,286.88, 117,434.16 and 31,533.44 is: 47,301.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,286.88 : 117,434.16 = 31,533.44 : x
  2. Step 2: Convert to fraction form
    78,286.88/117,434.16 = 31,533.44/x
  3. Step 3: Cross multiply
    78,286.88x = 117,434.16 × 31,533.44
  4. Step 4: Simplify right side
    78,286.88x = 3,703,103,038.31
  5. Step 5: Solve for x
    x = 3,703,103,038.31/78,286.88
  6. Step 6: Final answer
    x = 47,301.71

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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.