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Finding the Fourth Proportional to 86,641.76, 129,886.68 and 41,640.59

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Solution

The fourth proportional to 86,641.76, 129,886.68 and 41,640.59 is: 62,424.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,641.76 : 129,886.68 = 41,640.59 : x
  2. Step 2: Convert to fraction form
    86,641.76/129,886.68 = 41,640.59/x
  3. Step 3: Cross multiply
    86,641.76x = 129,886.68 × 41,640.59
  4. Step 4: Simplify right side
    86,641.76x = 5,408,557,988.34
  5. Step 5: Solve for x
    x = 5,408,557,988.34/86,641.76
  6. Step 6: Final answer
    x = 62,424.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.