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Finding the Fourth Proportional to 78,876.71, 118,315.37 and 19,712.44

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Solution

The fourth proportional to 78,876.71, 118,315.37 and 19,712.44 is: 29,568.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,876.71 : 118,315.37 = 19,712.44 : x
  2. Step 2: Convert to fraction form
    78,876.71/118,315.37 = 19,712.44/x
  3. Step 3: Cross multiply
    78,876.71x = 118,315.37 × 19,712.44
  4. Step 4: Simplify right side
    78,876.71x = 2,332,284,632.20
  5. Step 5: Solve for x
    x = 2,332,284,632.20/78,876.71
  6. Step 6: Final answer
    x = 29,568.74

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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.