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Finding the Fourth Proportional to 101,554.49, 140,291.17 and 81,109.71

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Solution

The fourth proportional to 101,554.49, 140,291.17 and 81,109.71 is: 112,047.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,554.49 : 140,291.17 = 81,109.71 : x
  2. Step 2: Convert to fraction form
    101,554.49/140,291.17 = 81,109.71/x
  3. Step 3: Cross multiply
    101,554.49x = 140,291.17 × 81,109.71
  4. Step 4: Simplify right side
    101,554.49x = 11,378,975,670.55
  5. Step 5: Solve for x
    x = 11,378,975,670.55/101,554.49
  6. Step 6: Final answer
    x = 112,047.99

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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.