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Finding the Fourth Proportional to 78,910.95, 108,897.64 and 43,100.95

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Solution

The fourth proportional to 78,910.95, 108,897.64 and 43,100.95 is: 59,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,910.95 : 108,897.64 = 43,100.95 : x
  2. Step 2: Convert to fraction form
    78,910.95/108,897.64 = 43,100.95/x
  3. Step 3: Cross multiply
    78,910.95x = 108,897.64 × 43,100.95
  4. Step 4: Simplify right side
    78,910.95x = 4,693,591,529.03
  5. Step 5: Solve for x
    x = 4,693,591,529.03/78,910.95
  6. Step 6: Final answer
    x = 59,479.60

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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.