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Finding the Fourth Proportional to 139,266.68, 208,873.40 and 39,402.80

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Solution

The fourth proportional to 139,266.68, 208,873.40 and 39,402.80 is: 59,096.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,266.68 : 208,873.40 = 39,402.80 : x
  2. Step 2: Convert to fraction form
    139,266.68/208,873.40 = 39,402.80/x
  3. Step 3: Cross multiply
    139,266.68x = 208,873.40 × 39,402.80
  4. Step 4: Simplify right side
    139,266.68x = 8,230,196,805.52
  5. Step 5: Solve for x
    x = 8,230,196,805.52/139,266.68
  6. Step 6: Final answer
    x = 59,096.67

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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.