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Finding the Fourth Proportional to 86,587.80, 129,893.85 and 27,417.30

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Solution

The fourth proportional to 86,587.80, 129,893.85 and 27,417.30 is: 41,129.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,587.80 : 129,893.85 = 27,417.30 : x
  2. Step 2: Convert to fraction form
    86,587.80/129,893.85 = 27,417.30/x
  3. Step 3: Cross multiply
    86,587.80x = 129,893.85 × 27,417.30
  4. Step 4: Simplify right side
    86,587.80x = 3,561,338,653.61
  5. Step 5: Solve for x
    x = 3,561,338,653.61/86,587.80
  6. Step 6: Final answer
    x = 41,129.80

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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.