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Finding the Fourth Proportional to 66,447.77, 99,671.65 and 31,390.97

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Solution

The fourth proportional to 66,447.77, 99,671.65 and 31,390.97 is: 47,086.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,447.77 : 99,671.65 = 31,390.97 : x
  2. Step 2: Convert to fraction form
    66,447.77/99,671.65 = 31,390.97/x
  3. Step 3: Cross multiply
    66,447.77x = 99,671.65 × 31,390.97
  4. Step 4: Simplify right side
    66,447.77x = 3,128,789,198.16
  5. Step 5: Solve for x
    x = 3,128,789,198.16/66,447.77
  6. Step 6: Final answer
    x = 47,086.45

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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.