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Finding the Fourth Proportional to 139,276.34, 208,834.38 and 74,280.56

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Solution

The fourth proportional to 139,276.34, 208,834.38 and 74,280.56 is: 111,378.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,276.34 : 208,834.38 = 74,280.56 : x
  2. Step 2: Convert to fraction form
    139,276.34/208,834.38 = 74,280.56/x
  3. Step 3: Cross multiply
    139,276.34x = 208,834.38 × 74,280.56
  4. Step 4: Simplify right side
    139,276.34x = 15,512,333,649.48
  5. Step 5: Solve for x
    x = 15,512,333,649.48/139,276.34
  6. Step 6: Final answer
    x = 111,378.10

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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.