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Finding the Fourth Proportional to 40,657.80, 60,986.70 and 30,289.80

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Solution

The fourth proportional to 40,657.80, 60,986.70 and 30,289.80 is: 45,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,657.80 : 60,986.70 = 30,289.80 : x
  2. Step 2: Convert to fraction form
    40,657.80/60,986.70 = 30,289.80/x
  3. Step 3: Cross multiply
    40,657.80x = 60,986.70 × 30,289.80
  4. Step 4: Simplify right side
    40,657.80x = 1,847,274,945.66
  5. Step 5: Solve for x
    x = 1,847,274,945.66/40,657.80
  6. Step 6: Final answer
    x = 45,434.70

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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.