Home / 138,947.55-191,747.79-75,285.30

Finding the Fourth Proportional to 138,947.55, 191,747.79 and 75,285.30

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Solution

The fourth proportional to 138,947.55, 191,747.79 and 75,285.30 is: 103,893.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,947.55 : 191,747.79 = 75,285.30 : x
  2. Step 2: Convert to fraction form
    138,947.55/191,747.79 = 75,285.30/x
  3. Step 3: Cross multiply
    138,947.55x = 191,747.79 × 75,285.30
  4. Step 4: Simplify right side
    138,947.55x = 14,435,789,894.49
  5. Step 5: Solve for x
    x = 14,435,789,894.49/138,947.55
  6. Step 6: Final answer
    x = 103,893.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.