Home / 138,928.67-191,721.76-75,266.47

Finding the Fourth Proportional to 138,928.67, 191,721.76 and 75,266.47

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Solution

The fourth proportional to 138,928.67, 191,721.76 and 75,266.47 is: 103,867.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,928.67 : 191,721.76 = 75,266.47 : x
  2. Step 2: Convert to fraction form
    138,928.67/191,721.76 = 75,266.47/x
  3. Step 3: Cross multiply
    138,928.67x = 191,721.76 × 75,266.47
  4. Step 4: Simplify right side
    138,928.67x = 14,430,219,429.92
  5. Step 5: Solve for x
    x = 14,430,219,429.92/138,928.67
  6. Step 6: Final answer
    x = 103,867.83

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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.