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Finding the Fourth Proportional to 57,328.64, 85,993.96 and 19,890.04

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Solution

The fourth proportional to 57,328.64, 85,993.96 and 19,890.04 is: 29,835.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,328.64 : 85,993.96 = 19,890.04 : x
  2. Step 2: Convert to fraction form
    57,328.64/85,993.96 = 19,890.04/x
  3. Step 3: Cross multiply
    57,328.64x = 85,993.96 × 19,890.04
  4. Step 4: Simplify right side
    57,328.64x = 1,710,423,304.16
  5. Step 5: Solve for x
    x = 1,710,423,304.16/57,328.64
  6. Step 6: Final answer
    x = 29,835.41

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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.