Home / 138,605.92-191,275.91-78,176.37

Finding the Fourth Proportional to 138,605.92, 191,275.91 and 78,176.37

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Solution

The fourth proportional to 138,605.92, 191,275.91 and 78,176.37 is: 107,883.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,605.92 : 191,275.91 = 78,176.37 : x
  2. Step 2: Convert to fraction form
    138,605.92/191,275.91 = 78,176.37/x
  3. Step 3: Cross multiply
    138,605.92x = 191,275.91 × 78,176.37
  4. Step 4: Simplify right side
    138,605.92x = 14,953,256,711.94
  5. Step 5: Solve for x
    x = 14,953,256,711.94/138,605.92
  6. Step 6: Final answer
    x = 107,883.25

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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.