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Finding the Fourth Proportional to 71,229.76, 98,280.48 and 42,936.64

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Solution

The fourth proportional to 71,229.76, 98,280.48 and 42,936.64 is: 59,242.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,229.76 : 98,280.48 = 42,936.64 : x
  2. Step 2: Convert to fraction form
    71,229.76/98,280.48 = 42,936.64/x
  3. Step 3: Cross multiply
    71,229.76x = 98,280.48 × 42,936.64
  4. Step 4: Simplify right side
    71,229.76x = 4,219,833,588.79
  5. Step 5: Solve for x
    x = 4,219,833,588.79/71,229.76
  6. Step 6: Final answer
    x = 59,242.56

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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.