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Finding the Fourth Proportional to 86,577.30, 129,878.10 and 27,406.80

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Solution

The fourth proportional to 86,577.30, 129,878.10 and 27,406.80 is: 41,114.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,577.30 : 129,878.10 = 27,406.80 : x
  2. Step 2: Convert to fraction form
    86,577.30/129,878.10 = 27,406.80/x
  3. Step 3: Cross multiply
    86,577.30x = 129,878.10 × 27,406.80
  4. Step 4: Simplify right side
    86,577.30x = 3,559,543,111.08
  5. Step 5: Solve for x
    x = 3,559,543,111.08/86,577.30
  6. Step 6: Final answer
    x = 41,114.05

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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.