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Finding the Fourth Proportional to 57,280.64, 85,928.49 and 21,252.19

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Solution

The fourth proportional to 57,280.64, 85,928.49 and 21,252.19 is: 31,881.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,280.64 : 85,928.49 = 21,252.19 : x
  2. Step 2: Convert to fraction form
    57,280.64/85,928.49 = 21,252.19/x
  3. Step 3: Cross multiply
    57,280.64x = 85,928.49 × 21,252.19
  4. Step 4: Simplify right side
    57,280.64x = 1,826,168,164.73
  5. Step 5: Solve for x
    x = 1,826,168,164.73/57,280.64
  6. Step 6: Final answer
    x = 31,881.07

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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.