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Finding the Fourth Proportional to 40,486.62, 60,729.93 and 20,752.59

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Solution

The fourth proportional to 40,486.62, 60,729.93 and 20,752.59 is: 31,128.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,486.62 : 60,729.93 = 20,752.59 : x
  2. Step 2: Convert to fraction form
    40,486.62/60,729.93 = 20,752.59/x
  3. Step 3: Cross multiply
    40,486.62x = 60,729.93 × 20,752.59
  4. Step 4: Simplify right side
    40,486.62x = 1,260,303,338.02
  5. Step 5: Solve for x
    x = 1,260,303,338.02/40,486.62
  6. Step 6: Final answer
    x = 31,128.89

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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.