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Finding the Fourth Proportional to 139,217.72, 208,830.68 and 34,036.70

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Solution

The fourth proportional to 139,217.72, 208,830.68 and 34,036.70 is: 51,056.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,217.72 : 208,830.68 = 34,036.70 : x
  2. Step 2: Convert to fraction form
    139,217.72/208,830.68 = 34,036.70/x
  3. Step 3: Cross multiply
    139,217.72x = 208,830.68 × 34,036.70
  4. Step 4: Simplify right side
    139,217.72x = 7,107,905,991.62
  5. Step 5: Solve for x
    x = 7,107,905,991.62/139,217.72
  6. Step 6: Final answer
    x = 51,056.05

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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.