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Finding the Fourth Proportional to 139,896.96, 209,868.68 and 55,657.92

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Solution

The fourth proportional to 139,896.96, 209,868.68 and 55,657.92 is: 83,496.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,896.96 : 209,868.68 = 55,657.92 : x
  2. Step 2: Convert to fraction form
    139,896.96/209,868.68 = 55,657.92/x
  3. Step 3: Cross multiply
    139,896.96x = 209,868.68 × 55,657.92
  4. Step 4: Simplify right side
    139,896.96x = 11,680,854,201.95
  5. Step 5: Solve for x
    x = 11,680,854,201.95/139,896.96
  6. Step 6: Final answer
    x = 83,496.13

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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.