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Finding the Fourth Proportional to 139,230.30, 208,845.45 and 34,047.90

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Solution

The fourth proportional to 139,230.30, 208,845.45 and 34,047.90 is: 51,071.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,230.30 : 208,845.45 = 34,047.90 : x
  2. Step 2: Convert to fraction form
    139,230.30/208,845.45 = 34,047.90/x
  3. Step 3: Cross multiply
    139,230.30x = 208,845.45 × 34,047.90
  4. Step 4: Simplify right side
    139,230.30x = 7,110,748,997.06
  5. Step 5: Solve for x
    x = 7,110,748,997.06/139,230.30
  6. Step 6: Final answer
    x = 51,071.85

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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.