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Finding the Fourth Proportional to 66,645.30, 99,918.54 and 40,343.82

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Solution

The fourth proportional to 66,645.30, 99,918.54 and 40,343.82 is: 60,485.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,645.30 : 99,918.54 = 40,343.82 : x
  2. Step 2: Convert to fraction form
    66,645.30/99,918.54 = 40,343.82/x
  3. Step 3: Cross multiply
    66,645.30x = 99,918.54 × 40,343.82
  4. Step 4: Simplify right side
    66,645.30x = 4,031,095,592.42
  5. Step 5: Solve for x
    x = 4,031,095,592.42/66,645.30
  6. Step 6: Final answer
    x = 60,485.82

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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.