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Finding the Fourth Proportional to 40,807.67, 61,221.79 and 19,757.79

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Solution

The fourth proportional to 40,807.67, 61,221.79 and 19,757.79 is: 29,641.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,807.67 : 61,221.79 = 19,757.79 : x
  2. Step 2: Convert to fraction form
    40,807.67/61,221.79 = 19,757.79/x
  3. Step 3: Cross multiply
    40,807.67x = 61,221.79 × 19,757.79
  4. Step 4: Simplify right side
    40,807.67x = 1,209,607,294.94
  5. Step 5: Solve for x
    x = 1,209,607,294.94/40,807.67
  6. Step 6: Final answer
    x = 29,641.67

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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.