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Finding the Fourth Proportional to 86,798.56, 119,695.76 and 65,339.68

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Solution

The fourth proportional to 86,798.56, 119,695.76 and 65,339.68 is: 90,103.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,798.56 : 119,695.76 = 65,339.68 : x
  2. Step 2: Convert to fraction form
    86,798.56/119,695.76 = 65,339.68/x
  3. Step 3: Cross multiply
    86,798.56x = 119,695.76 × 65,339.68
  4. Step 4: Simplify right side
    86,798.56x = 7,820,882,655.76
  5. Step 5: Solve for x
    x = 7,820,882,655.76/86,798.56
  6. Step 6: Final answer
    x = 90,103.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.