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Finding the Fourth Proportional to 66,030.26, 91,121.22 and 35,815.50

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Solution

The fourth proportional to 66,030.26, 91,121.22 and 35,815.50 is: 49,425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,030.26 : 91,121.22 = 35,815.50 : x
  2. Step 2: Convert to fraction form
    66,030.26/91,121.22 = 35,815.50/x
  3. Step 3: Cross multiply
    66,030.26x = 91,121.22 × 35,815.50
  4. Step 4: Simplify right side
    66,030.26x = 3,263,552,054.91
  5. Step 5: Solve for x
    x = 3,263,552,054.91/66,030.26
  6. Step 6: Final answer
    x = 49,425.10

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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.