Home / 78,825.91-118,246.20-31,429.54

Finding the Fourth Proportional to 78,825.91, 118,246.20 and 31,429.54

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Solution

The fourth proportional to 78,825.91, 118,246.20 and 31,429.54 is: 47,147.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,825.91 : 118,246.20 = 31,429.54 : x
  2. Step 2: Convert to fraction form
    78,825.91/118,246.20 = 31,429.54/x
  3. Step 3: Cross multiply
    78,825.91x = 118,246.20 × 31,429.54
  4. Step 4: Simplify right side
    78,825.91x = 3,716,423,672.75
  5. Step 5: Solve for x
    x = 3,716,423,672.75/78,825.91
  6. Step 6: Final answer
    x = 47,147.23

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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.