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Finding the Fourth Proportional to 86,326.91, 129,507.98 and 36,406.91

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Solution

The fourth proportional to 86,326.91, 129,507.98 and 36,406.91 is: 54,617.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,326.91 : 129,507.98 = 36,406.91 : x
  2. Step 2: Convert to fraction form
    86,326.91/129,507.98 = 36,406.91/x
  3. Step 3: Cross multiply
    86,326.91x = 129,507.98 × 36,406.91
  4. Step 4: Simplify right side
    86,326.91x = 4,714,985,513.88
  5. Step 5: Solve for x
    x = 4,714,985,513.88/86,326.91
  6. Step 6: Final answer
    x = 54,617.80

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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.