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Finding the Fourth Proportional to 57,074.80, 85,606.80 and 19,631.20

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Solution

The fourth proportional to 57,074.80, 85,606.80 and 19,631.20 is: 29,444.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,074.80 : 85,606.80 = 19,631.20 : x
  2. Step 2: Convert to fraction form
    57,074.80/85,606.80 = 19,631.20/x
  3. Step 3: Cross multiply
    57,074.80x = 85,606.80 × 19,631.20
  4. Step 4: Simplify right side
    57,074.80x = 1,680,564,212.16
  5. Step 5: Solve for x
    x = 1,680,564,212.16/57,074.80
  6. Step 6: Final answer
    x = 29,444.94

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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.