Home / 99,639.75-149,277.36-78,338.37

Finding the Fourth Proportional to 99,639.75, 149,277.36 and 78,338.37

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Solution

The fourth proportional to 99,639.75, 149,277.36 and 78,338.37 is: 117,364.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,639.75 : 149,277.36 = 78,338.37 : x
  2. Step 2: Convert to fraction form
    99,639.75/149,277.36 = 78,338.37/x
  3. Step 3: Cross multiply
    99,639.75x = 149,277.36 × 78,338.37
  4. Step 4: Simplify right side
    99,639.75x = 11,694,145,060.30
  5. Step 5: Solve for x
    x = 11,694,145,060.30/99,639.75
  6. Step 6: Final answer
    x = 117,364.26

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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.