Home / 138,554.66-191,207.56-81,180.25

Finding the Fourth Proportional to 138,554.66, 191,207.56 and 81,180.25

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Solution

The fourth proportional to 138,554.66, 191,207.56 and 81,180.25 is: 112,029.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,554.66 : 191,207.56 = 81,180.25 : x
  2. Step 2: Convert to fraction form
    138,554.66/191,207.56 = 81,180.25/x
  3. Step 3: Cross multiply
    138,554.66x = 191,207.56 × 81,180.25
  4. Step 4: Simplify right side
    138,554.66x = 15,522,277,417.55
  5. Step 5: Solve for x
    x = 15,522,277,417.55/138,554.66
  6. Step 6: Final answer
    x = 112,029.99

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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.