Home / 138,947.76-191,747.40-75,285.72

Finding the Fourth Proportional to 138,947.76, 191,747.40 and 75,285.72

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Solution

The fourth proportional to 138,947.76, 191,747.40 and 75,285.72 is: 103,894.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,947.76 : 191,747.40 = 75,285.72 : x
  2. Step 2: Convert to fraction form
    138,947.76/191,747.40 = 75,285.72/x
  3. Step 3: Cross multiply
    138,947.76x = 191,747.40 × 75,285.72
  4. Step 4: Simplify right side
    138,947.76x = 14,435,840,690.70
  5. Step 5: Solve for x
    x = 14,435,840,690.70/138,947.76
  6. Step 6: Final answer
    x = 103,894.02

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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.