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Finding the Fourth Proportional to 54,622.72, 81,870.16 and 20,866.64

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Solution

The fourth proportional to 54,622.72, 81,870.16 and 20,866.64 is: 31,275.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,622.72 : 81,870.16 = 20,866.64 : x
  2. Step 2: Convert to fraction form
    54,622.72/81,870.16 = 20,866.64/x
  3. Step 3: Cross multiply
    54,622.72x = 81,870.16 × 20,866.64
  4. Step 4: Simplify right side
    54,622.72x = 1,708,355,155.46
  5. Step 5: Solve for x
    x = 1,708,355,155.46/54,622.72
  6. Step 6: Final answer
    x = 31,275.54

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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.