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Finding the Fourth Proportional to 66,012.57, 98,969.65 and 39,711.16

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Solution

The fourth proportional to 66,012.57, 98,969.65 and 39,711.16 is: 59,537.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,012.57 : 98,969.65 = 39,711.16 : x
  2. Step 2: Convert to fraction form
    66,012.57/98,969.65 = 39,711.16/x
  3. Step 3: Cross multiply
    66,012.57x = 98,969.65 × 39,711.16
  4. Step 4: Simplify right side
    66,012.57x = 3,930,199,630.73
  5. Step 5: Solve for x
    x = 3,930,199,630.73/66,012.57
  6. Step 6: Final answer
    x = 59,537.14

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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.