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Finding the Fourth Proportional to 139,611.70, 209,538.60 and 73,098.46

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Solution

The fourth proportional to 139,611.70, 209,538.60 and 73,098.46 is: 109,711.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,611.70 : 209,538.60 = 73,098.46 : x
  2. Step 2: Convert to fraction form
    139,611.70/209,538.60 = 73,098.46/x
  3. Step 3: Cross multiply
    139,611.70x = 209,538.60 × 73,098.46
  4. Step 4: Simplify right side
    139,611.70x = 15,316,948,970.56
  5. Step 5: Solve for x
    x = 15,316,948,970.56/139,611.70
  6. Step 6: Final answer
    x = 109,711.07

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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.