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Finding the Fourth Proportional to 71,386.64, 98,525.16 and 68,236.88

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Solution

The fourth proportional to 71,386.64, 98,525.16 and 68,236.88 is: 94,177.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,386.64 : 98,525.16 = 68,236.88 : x
  2. Step 2: Convert to fraction form
    71,386.64/98,525.16 = 68,236.88/x
  3. Step 3: Cross multiply
    71,386.64x = 98,525.16 × 68,236.88
  4. Step 4: Simplify right side
    71,386.64x = 6,723,049,519.90
  5. Step 5: Solve for x
    x = 6,723,049,519.90/71,386.64
  6. Step 6: Final answer
    x = 94,177.98

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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.