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Finding the Fourth Proportional to 65,990.61, 91,067.68 and 35,775.86

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Solution

The fourth proportional to 65,990.61, 91,067.68 and 35,775.86 is: 49,371.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,990.61 : 91,067.68 = 35,775.86 : x
  2. Step 2: Convert to fraction form
    65,990.61/91,067.68 = 35,775.86/x
  3. Step 3: Cross multiply
    65,990.61x = 91,067.68 × 35,775.86
  4. Step 4: Simplify right side
    65,990.61x = 3,258,024,159.59
  5. Step 5: Solve for x
    x = 3,258,024,159.59/65,990.61
  6. Step 6: Final answer
    x = 49,371.03

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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.