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Finding the Fourth Proportional to 99,743.66, 149,615.48 and 42,805.22

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Solution

The fourth proportional to 99,743.66, 149,615.48 and 42,805.22 is: 64,207.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,743.66 : 149,615.48 = 42,805.22 : x
  2. Step 2: Convert to fraction form
    99,743.66/149,615.48 = 42,805.22/x
  3. Step 3: Cross multiply
    99,743.66x = 149,615.48 × 42,805.22
  4. Step 4: Simplify right side
    99,743.66x = 6,404,322,574.70
  5. Step 5: Solve for x
    x = 6,404,322,574.70/99,743.66
  6. Step 6: Final answer
    x = 64,207.81

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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.