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Finding the Fourth Proportional to 66,030.92, 91,121.90 and 35,815.70

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Solution

The fourth proportional to 66,030.92, 91,121.90 and 35,815.70 is: 49,425.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,030.92 : 91,121.90 = 35,815.70 : x
  2. Step 2: Convert to fraction form
    66,030.92/91,121.90 = 35,815.70/x
  3. Step 3: Cross multiply
    66,030.92x = 91,121.90 × 35,815.70
  4. Step 4: Simplify right side
    66,030.92x = 3,263,594,633.83
  5. Step 5: Solve for x
    x = 3,263,594,633.83/66,030.92
  6. Step 6: Final answer
    x = 49,425.25

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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.