Home / 138,678.16-191,375.73-75,015.81

Finding the Fourth Proportional to 138,678.16, 191,375.73 and 75,015.81

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Solution

The fourth proportional to 138,678.16, 191,375.73 and 75,015.81 is: 103,521.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,678.16 : 191,375.73 = 75,015.81 : x
  2. Step 2: Convert to fraction form
    138,678.16/191,375.73 = 75,015.81/x
  3. Step 3: Cross multiply
    138,678.16x = 191,375.73 × 75,015.81
  4. Step 4: Simplify right side
    138,678.16x = 14,356,205,400.29
  5. Step 5: Solve for x
    x = 14,356,205,400.29/138,678.16
  6. Step 6: Final answer
    x = 103,521.75

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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.