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Finding the Fourth Proportional to 64,990.26, 97,470.38 and 20,608.74

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Solution

The fourth proportional to 64,990.26, 97,470.38 and 20,608.74 is: 30,908.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,990.26 : 97,470.38 = 20,608.74 : x
  2. Step 2: Convert to fraction form
    64,990.26/97,470.38 = 20,608.74/x
  3. Step 3: Cross multiply
    64,990.26x = 97,470.38 × 20,608.74
  4. Step 4: Simplify right side
    64,990.26x = 2,008,741,719.12
  5. Step 5: Solve for x
    x = 2,008,741,719.12/64,990.26
  6. Step 6: Final answer
    x = 30,908.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.