Home / 138,606.78-191,277.09-78,177.23

Finding the Fourth Proportional to 138,606.78, 191,277.09 and 78,177.23

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Solution

The fourth proportional to 138,606.78, 191,277.09 and 78,177.23 is: 107,884.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,606.78 : 191,277.09 = 78,177.23 : x
  2. Step 2: Convert to fraction form
    138,606.78/191,277.09 = 78,177.23/x
  3. Step 3: Cross multiply
    138,606.78x = 191,277.09 × 78,177.23
  4. Step 4: Simplify right side
    138,606.78x = 14,953,513,732.30
  5. Step 5: Solve for x
    x = 14,953,513,732.30/138,606.78
  6. Step 6: Final answer
    x = 107,884.43

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1.5x scale

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.