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Finding the Fourth Proportional to 54,577.65, 81,870.26 and 21,286.65

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Solution

The fourth proportional to 54,577.65, 81,870.26 and 21,286.65 is: 31,931.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,577.65 : 81,870.26 = 21,286.65 : x
  2. Step 2: Convert to fraction form
    54,577.65/81,870.26 = 21,286.65/x
  3. Step 3: Cross multiply
    54,577.65x = 81,870.26 × 21,286.65
  4. Step 4: Simplify right side
    54,577.65x = 1,742,743,463.60
  5. Step 5: Solve for x
    x = 1,742,743,463.60/54,577.65
  6. Step 6: Final answer
    x = 31,931.45

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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.