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Finding the Fourth Proportional to 66,149.71, 91,289.77 and 40,657.19

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Solution

The fourth proportional to 66,149.71, 91,289.77 and 40,657.19 is: 56,108.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,149.71 : 91,289.77 = 40,657.19 : x
  2. Step 2: Convert to fraction form
    66,149.71/91,289.77 = 40,657.19/x
  3. Step 3: Cross multiply
    66,149.71x = 91,289.77 × 40,657.19
  4. Step 4: Simplify right side
    66,149.71x = 3,711,584,965.85
  5. Step 5: Solve for x
    x = 3,711,584,965.85/66,149.71
  6. Step 6: Final answer
    x = 56,108.86

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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.