Home / 78,179.60-117,240.24-31,416.68

Finding the Fourth Proportional to 78,179.60, 117,240.24 and 31,416.68

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Solution

The fourth proportional to 78,179.60, 117,240.24 and 31,416.68 is: 47,113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,179.60 : 117,240.24 = 31,416.68 : x
  2. Step 2: Convert to fraction form
    78,179.60/117,240.24 = 31,416.68/x
  3. Step 3: Cross multiply
    78,179.60x = 117,240.24 × 31,416.68
  4. Step 4: Simplify right side
    78,179.60x = 3,683,299,103.20
  5. Step 5: Solve for x
    x = 3,683,299,103.20/78,179.60
  6. Step 6: Final answer
    x = 47,113.30

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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.