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Finding the Fourth Proportional to 86,010.68, 128,879.94 and 66,337.40

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Solution

The fourth proportional to 86,010.68, 128,879.94 and 66,337.40 is: 99,401.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,010.68 : 128,879.94 = 66,337.40 : x
  2. Step 2: Convert to fraction form
    86,010.68/128,879.94 = 66,337.40/x
  3. Step 3: Cross multiply
    86,010.68x = 128,879.94 × 66,337.40
  4. Step 4: Simplify right side
    86,010.68x = 8,549,560,131.76
  5. Step 5: Solve for x
    x = 8,549,560,131.76/86,010.68
  6. Step 6: Final answer
    x = 99,401.15

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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.