Home / 138,928.48-191,721.04-75,268

Finding the Fourth Proportional to 138,928.48, 191,721.04 and 75,268

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Solution

The fourth proportional to 138,928.48, 191,721.04 and 75,268 is: 103,869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,928.48 : 191,721.04 = 75,268 : x
  2. Step 2: Convert to fraction form
    138,928.48/191,721.04 = 75,268/x
  3. Step 3: Cross multiply
    138,928.48x = 191,721.04 × 75,268
  4. Step 4: Simplify right side
    138,928.48x = 14,430,459,238.72
  5. Step 5: Solve for x
    x = 14,430,459,238.72/138,928.48
  6. Step 6: Final answer
    x = 103,869.70

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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.