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Finding the Fourth Proportional to 77,272.71, 106,531.65 and 66,062.64

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Solution

The fourth proportional to 77,272.71, 106,531.65 and 66,062.64 is: 91,076.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,272.71 : 106,531.65 = 66,062.64 : x
  2. Step 2: Convert to fraction form
    77,272.71/106,531.65 = 66,062.64/x
  3. Step 3: Cross multiply
    77,272.71x = 106,531.65 × 66,062.64
  4. Step 4: Simplify right side
    77,272.71x = 7,037,762,042.56
  5. Step 5: Solve for x
    x = 7,037,762,042.56/77,272.71
  6. Step 6: Final answer
    x = 91,076.94

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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.