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Finding the Fourth Proportional to 78,920.88, 108,910.16 and 43,110.90

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Solution

The fourth proportional to 78,920.88, 108,910.16 and 43,110.90 is: 59,492.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,920.88 : 108,910.16 = 43,110.90 : x
  2. Step 2: Convert to fraction form
    78,920.88/108,910.16 = 43,110.90/x
  3. Step 3: Cross multiply
    78,920.88x = 108,910.16 × 43,110.90
  4. Step 4: Simplify right side
    78,920.88x = 4,695,215,016.74
  5. Step 5: Solve for x
    x = 4,695,215,016.74/78,920.88
  6. Step 6: Final answer
    x = 59,492.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.