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Finding the Fourth Proportional to 86,775.70, 130,163.55 and 67,092.70

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Solution

The fourth proportional to 86,775.70, 130,163.55 and 67,092.70 is: 100,639.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,775.70 : 130,163.55 = 67,092.70 : x
  2. Step 2: Convert to fraction form
    86,775.70/130,163.55 = 67,092.70/x
  3. Step 3: Cross multiply
    86,775.70x = 130,163.55 × 67,092.70
  4. Step 4: Simplify right side
    86,775.70x = 8,733,024,011.09
  5. Step 5: Solve for x
    x = 8,733,024,011.09/86,775.70
  6. Step 6: Final answer
    x = 100,639.05

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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.