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Finding the Fourth Proportional to 66,005.69, 91,063.94 and 43,356.95

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Solution

The fourth proportional to 66,005.69, 91,063.94 and 43,356.95 is: 59,816.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,005.69 : 91,063.94 = 43,356.95 : x
  2. Step 2: Convert to fraction form
    66,005.69/91,063.94 = 43,356.95/x
  3. Step 3: Cross multiply
    66,005.69x = 91,063.94 × 43,356.95
  4. Step 4: Simplify right side
    66,005.69x = 3,948,254,021.28
  5. Step 5: Solve for x
    x = 3,948,254,021.28/66,005.69
  6. Step 6: Final answer
    x = 59,816.87

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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.