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Finding the Fourth Proportional to 77,572.44, 116,356.34 and 21,415.97

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Solution

The fourth proportional to 77,572.44, 116,356.34 and 21,415.97 is: 32,123.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,572.44 : 116,356.34 = 21,415.97 : x
  2. Step 2: Convert to fraction form
    77,572.44/116,356.34 = 21,415.97/x
  3. Step 3: Cross multiply
    77,572.44x = 116,356.34 × 21,415.97
  4. Step 4: Simplify right side
    77,572.44x = 2,491,884,097.33
  5. Step 5: Solve for x
    x = 2,491,884,097.33/77,572.44
  6. Step 6: Final answer
    x = 32,123.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.