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Finding the Fourth Proportional to 86,682.80, 130,218.60 and 60,438.80

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Solution

The fourth proportional to 86,682.80, 130,218.60 and 60,438.80 is: 90,793.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,682.80 : 130,218.60 = 60,438.80 : x
  2. Step 2: Convert to fraction form
    86,682.80/130,218.60 = 60,438.80/x
  3. Step 3: Cross multiply
    86,682.80x = 130,218.60 × 60,438.80
  4. Step 4: Simplify right side
    86,682.80x = 7,870,255,921.68
  5. Step 5: Solve for x
    x = 7,870,255,921.68/86,682.80
  6. Step 6: Final answer
    x = 90,793.74

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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.