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Finding the Fourth Proportional to 71,722.12, 98,964.50 and 39,886.76

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Solution

The fourth proportional to 71,722.12, 98,964.50 and 39,886.76 is: 55,037.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,722.12 : 98,964.50 = 39,886.76 : x
  2. Step 2: Convert to fraction form
    71,722.12/98,964.50 = 39,886.76/x
  3. Step 3: Cross multiply
    71,722.12x = 98,964.50 × 39,886.76
  4. Step 4: Simplify right side
    71,722.12x = 3,947,373,260.02
  5. Step 5: Solve for x
    x = 3,947,373,260.02/71,722.12
  6. Step 6: Final answer
    x = 55,037.04

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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.