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Finding the Fourth Proportional to 57,811.70, 86,620.35 and 47,897.30

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Solution

The fourth proportional to 57,811.70, 86,620.35 and 47,897.30 is: 71,765.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,811.70 : 86,620.35 = 47,897.30 : x
  2. Step 2: Convert to fraction form
    57,811.70/86,620.35 = 47,897.30/x
  3. Step 3: Cross multiply
    57,811.70x = 86,620.35 × 47,897.30
  4. Step 4: Simplify right side
    57,811.70x = 4,148,880,890.06
  5. Step 5: Solve for x
    x = 4,148,880,890.06/57,811.70
  6. Step 6: Final answer
    x = 71,765.42

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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.