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Finding the Fourth Proportional to 81,437.66, 122,016.24 and 63,661.40

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Solution

The fourth proportional to 81,437.66, 122,016.24 and 63,661.40 is: 95,382.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,437.66 : 122,016.24 = 63,661.40 : x
  2. Step 2: Convert to fraction form
    81,437.66/122,016.24 = 63,661.40/x
  3. Step 3: Cross multiply
    81,437.66x = 122,016.24 × 63,661.40
  4. Step 4: Simplify right side
    81,437.66x = 7,767,724,661.14
  5. Step 5: Solve for x
    x = 7,767,724,661.14/81,437.66
  6. Step 6: Final answer
    x = 95,382.46

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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.