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Finding the Fourth Proportional to 66,197.12, 91,372.92 and 42,323.89

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Solution

The fourth proportional to 66,197.12, 91,372.92 and 42,323.89 is: 58,420.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,197.12 : 91,372.92 = 42,323.89 : x
  2. Step 2: Convert to fraction form
    66,197.12/91,372.92 = 42,323.89/x
  3. Step 3: Cross multiply
    66,197.12x = 91,372.92 × 42,323.89
  4. Step 4: Simplify right side
    66,197.12x = 3,867,257,345.34
  5. Step 5: Solve for x
    x = 3,867,257,345.34/66,197.12
  6. Step 6: Final answer
    x = 58,420.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.