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Finding the Fourth Proportional to 83,878.56, 115,754.76 and 45,640.44

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Solution

The fourth proportional to 83,878.56, 115,754.76 and 45,640.44 is: 62,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,878.56 : 115,754.76 = 45,640.44 : x
  2. Step 2: Convert to fraction form
    83,878.56/115,754.76 = 45,640.44/x
  3. Step 3: Cross multiply
    83,878.56x = 115,754.76 × 45,640.44
  4. Step 4: Simplify right side
    83,878.56x = 5,283,098,178.49
  5. Step 5: Solve for x
    x = 5,283,098,178.49/83,878.56
  6. Step 6: Final answer
    x = 62,985.08

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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.