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Finding the Fourth Proportional to 66,340.20, 91,479.32 and 51,235.32

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Solution

The fourth proportional to 66,340.20, 91,479.32 and 51,235.32 is: 70,650.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,340.20 : 91,479.32 = 51,235.32 : x
  2. Step 2: Convert to fraction form
    66,340.20/91,479.32 = 51,235.32/x
  3. Step 3: Cross multiply
    66,340.20x = 91,479.32 × 51,235.32
  4. Step 4: Simplify right side
    66,340.20x = 4,686,972,233.58
  5. Step 5: Solve for x
    x = 4,686,972,233.58/66,340.20
  6. Step 6: Final answer
    x = 70,650.56

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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.