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Finding the Fourth Proportional to 70,959.72, 97,921.08 and 40,724.04

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Solution

The fourth proportional to 70,959.72, 97,921.08 and 40,724.04 is: 56,197.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,959.72 : 97,921.08 = 40,724.04 : x
  2. Step 2: Convert to fraction form
    70,959.72/97,921.08 = 40,724.04/x
  3. Step 3: Cross multiply
    70,959.72x = 97,921.08 × 40,724.04
  4. Step 4: Simplify right side
    70,959.72x = 3,987,741,978.76
  5. Step 5: Solve for x
    x = 3,987,741,978.76/70,959.72
  6. Step 6: Final answer
    x = 56,197.26

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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.