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Finding the Fourth Proportional to 137,211.60, 205,729.80 and 58,285.20

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Solution

The fourth proportional to 137,211.60, 205,729.80 and 58,285.20 is: 87,390.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,211.60 : 205,729.80 = 58,285.20 : x
  2. Step 2: Convert to fraction form
    137,211.60/205,729.80 = 58,285.20/x
  3. Step 3: Cross multiply
    137,211.60x = 205,729.80 × 58,285.20
  4. Step 4: Simplify right side
    137,211.60x = 11,991,002,538.96
  5. Step 5: Solve for x
    x = 11,991,002,538.96/137,211.60
  6. Step 6: Final answer
    x = 87,390.59

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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.