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Finding the Fourth Proportional to 139,720.78, 209,607.09 and 46,227.34

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Solution

The fourth proportional to 139,720.78, 209,607.09 and 46,227.34 is: 69,349.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,720.78 : 209,607.09 = 46,227.34 : x
  2. Step 2: Convert to fraction form
    139,720.78/209,607.09 = 46,227.34/x
  3. Step 3: Cross multiply
    139,720.78x = 209,607.09 × 46,227.34
  4. Step 4: Simplify right side
    139,720.78x = 9,689,578,215.84
  5. Step 5: Solve for x
    x = 9,689,578,215.84/139,720.78
  6. Step 6: Final answer
    x = 69,349.59

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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.