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Finding the Fourth Proportional to 99,805.95, 149,726.21 and 40,673.79

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Solution

The fourth proportional to 99,805.95, 149,726.21 and 40,673.79 is: 61,017.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,805.95 : 149,726.21 = 40,673.79 : x
  2. Step 2: Convert to fraction form
    99,805.95/149,726.21 = 40,673.79/x
  3. Step 3: Cross multiply
    99,805.95x = 149,726.21 × 40,673.79
  4. Step 4: Simplify right side
    99,805.95x = 6,089,932,219.67
  5. Step 5: Solve for x
    x = 6,089,932,219.67/99,805.95
  6. Step 6: Final answer
    x = 61,017.73

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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.