Home / 138,606.27-191,275.73-78,177.41

Finding the Fourth Proportional to 138,606.27, 191,275.73 and 78,177.41

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Solution

The fourth proportional to 138,606.27, 191,275.73 and 78,177.41 is: 107,884.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,606.27 : 191,275.73 = 78,177.41 : x
  2. Step 2: Convert to fraction form
    138,606.27/191,275.73 = 78,177.41/x
  3. Step 3: Cross multiply
    138,606.27x = 191,275.73 × 78,177.41
  4. Step 4: Simplify right side
    138,606.27x = 14,953,439,819.99
  5. Step 5: Solve for x
    x = 14,953,439,819.99/138,606.27
  6. Step 6: Final answer
    x = 107,884.30

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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.