Home / 138,453.91-191,130.17-81,085.25

Finding the Fourth Proportional to 138,453.91, 191,130.17 and 81,085.25

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Solution

The fourth proportional to 138,453.91, 191,130.17 and 81,085.25 is: 111,935.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,453.91 : 191,130.17 = 81,085.25 : x
  2. Step 2: Convert to fraction form
    138,453.91/191,130.17 = 81,085.25/x
  3. Step 3: Cross multiply
    138,453.91x = 191,130.17 × 81,085.25
  4. Step 4: Simplify right side
    138,453.91x = 15,497,838,297.53
  5. Step 5: Solve for x
    x = 15,497,838,297.53/138,453.91
  6. Step 6: Final answer
    x = 111,935.00

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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.