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Finding the Fourth Proportional to 139,276.29, 208,834.32 and 74,280.53

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Solution

The fourth proportional to 139,276.29, 208,834.32 and 74,280.53 is: 111,378.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,276.29 : 208,834.32 = 74,280.53 : x
  2. Step 2: Convert to fraction form
    139,276.29/208,834.32 = 74,280.53/x
  3. Step 3: Cross multiply
    139,276.29x = 208,834.32 × 74,280.53
  4. Step 4: Simplify right side
    139,276.29x = 15,512,322,927.62
  5. Step 5: Solve for x
    x = 15,512,322,927.62/139,276.29
  6. Step 6: Final answer
    x = 111,378.06

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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.