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Finding the Fourth Proportional to 86,910.68, 130,128.94 and 65,786.69

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Solution

The fourth proportional to 86,910.68, 130,128.94 and 65,786.69 is: 98,500.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,910.68 : 130,128.94 = 65,786.69 : x
  2. Step 2: Convert to fraction form
    86,910.68/130,128.94 = 65,786.69/x
  3. Step 3: Cross multiply
    86,910.68x = 130,128.94 × 65,786.69
  4. Step 4: Simplify right side
    86,910.68x = 8,560,752,235.81
  5. Step 5: Solve for x
    x = 8,560,752,235.81/86,910.68
  6. Step 6: Final answer
    x = 98,500.58

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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.