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Finding the Fourth Proportional to 83,530.79, 115,160.97 and 66,360.12

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Solution

The fourth proportional to 83,530.79, 115,160.97 and 66,360.12 is: 91,488.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,530.79 : 115,160.97 = 66,360.12 : x
  2. Step 2: Convert to fraction form
    83,530.79/115,160.97 = 66,360.12/x
  3. Step 3: Cross multiply
    83,530.79x = 115,160.97 × 66,360.12
  4. Step 4: Simplify right side
    83,530.79x = 7,642,095,456.72
  5. Step 5: Solve for x
    x = 7,642,095,456.72/83,530.79
  6. Step 6: Final answer
    x = 91,488.37

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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.