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Finding the Fourth Proportional to 139,580.91, 209,368.53 and 34,400.79

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Solution

The fourth proportional to 139,580.91, 209,368.53 and 34,400.79 is: 51,600.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,580.91 : 209,368.53 = 34,400.79 : x
  2. Step 2: Convert to fraction form
    139,580.91/209,368.53 = 34,400.79/x
  3. Step 3: Cross multiply
    139,580.91x = 209,368.53 × 34,400.79
  4. Step 4: Simplify right side
    139,580.91x = 7,202,442,833.14
  5. Step 5: Solve for x
    x = 7,202,442,833.14/139,580.91
  6. Step 6: Final answer
    x = 51,600.49

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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.