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Finding the Fourth Proportional to 66,223.71, 91,378.69 and 40,734.23

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Solution

The fourth proportional to 66,223.71, 91,378.69 and 40,734.23 is: 56,207.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,223.71 : 91,378.69 = 40,734.23 : x
  2. Step 2: Convert to fraction form
    66,223.71/91,378.69 = 40,734.23/x
  3. Step 3: Cross multiply
    66,223.71x = 91,378.69 × 40,734.23
  4. Step 4: Simplify right side
    66,223.71x = 3,722,240,016.83
  5. Step 5: Solve for x
    x = 3,722,240,016.83/66,223.71
  6. Step 6: Final answer
    x = 56,207.06

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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.