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Finding the Fourth Proportional to 66,155.13, 91,231.82 and 51,023.82

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Solution

The fourth proportional to 66,155.13, 91,231.82 and 51,023.82 is: 70,364.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,155.13 : 91,231.82 = 51,023.82 : x
  2. Step 2: Convert to fraction form
    66,155.13/91,231.82 = 51,023.82/x
  3. Step 3: Cross multiply
    66,155.13x = 91,231.82 × 51,023.82
  4. Step 4: Simplify right side
    66,155.13x = 4,654,996,240.29
  5. Step 5: Solve for x
    x = 4,654,996,240.29/66,155.13
  6. Step 6: Final answer
    x = 70,364.86

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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.