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Finding the Fourth Proportional to 71,190.60, 98,247.66 and 40,979.64

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Solution

The fourth proportional to 71,190.60, 98,247.66 and 40,979.64 is: 56,554.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,190.60 : 98,247.66 = 40,979.64 : x
  2. Step 2: Convert to fraction form
    71,190.60/98,247.66 = 40,979.64/x
  3. Step 3: Cross multiply
    71,190.60x = 98,247.66 × 40,979.64
  4. Step 4: Simplify right side
    71,190.60x = 4,026,153,737.64
  5. Step 5: Solve for x
    x = 4,026,153,737.64/71,190.60
  6. Step 6: Final answer
    x = 56,554.57

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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.