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Finding the Fourth Proportional to 78,902.17, 108,886.89 and 43,091.88

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Solution

The fourth proportional to 78,902.17, 108,886.89 and 43,091.88 is: 59,467.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,902.17 : 108,886.89 = 43,091.88 : x
  2. Step 2: Convert to fraction form
    78,902.17/108,886.89 = 43,091.88/x
  3. Step 3: Cross multiply
    78,902.17x = 108,886.89 × 43,091.88
  4. Step 4: Simplify right side
    78,902.17x = 4,692,140,797.45
  5. Step 5: Solve for x
    x = 4,692,140,797.45/78,902.17
  6. Step 6: Final answer
    x = 59,467.83

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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.