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Finding the Fourth Proportional to 65,819.20, 98,801.70 and 40,887.40

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Solution

The fourth proportional to 65,819.20, 98,801.70 and 40,887.40 is: 61,376.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,819.20 : 98,801.70 = 40,887.40 : x
  2. Step 2: Convert to fraction form
    65,819.20/98,801.70 = 40,887.40/x
  3. Step 3: Cross multiply
    65,819.20x = 98,801.70 × 40,887.40
  4. Step 4: Simplify right side
    65,819.20x = 4,039,744,628.58
  5. Step 5: Solve for x
    x = 4,039,744,628.58/65,819.20
  6. Step 6: Final answer
    x = 61,376.39

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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.