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Finding the Fourth Proportional to 57,488.40, 86,211.09 and 20,038.86

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Solution

The fourth proportional to 57,488.40, 86,211.09 and 20,038.86 is: 30,050.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,488.40 : 86,211.09 = 20,038.86 : x
  2. Step 2: Convert to fraction form
    57,488.40/86,211.09 = 20,038.86/x
  3. Step 3: Cross multiply
    57,488.40x = 86,211.09 × 20,038.86
  4. Step 4: Simplify right side
    57,488.40x = 1,727,571,962.96
  5. Step 5: Solve for x
    x = 1,727,571,962.96/57,488.40
  6. Step 6: Final answer
    x = 30,050.79

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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.