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Finding the Fourth Proportional to 86,529.15, 129,793.73 and 86,529.15

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Solution

The fourth proportional to 86,529.15, 129,793.73 and 86,529.15 is: 129,793.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,529.15 : 129,793.73 = 86,529.15 : x
  2. Step 2: Convert to fraction form
    86,529.15/129,793.73 = 86,529.15/x
  3. Step 3: Cross multiply
    86,529.15x = 129,793.73 × 86,529.15
  4. Step 4: Simplify right side
    86,529.15x = 11,230,940,699.58
  5. Step 5: Solve for x
    x = 11,230,940,699.58/86,529.15
  6. Step 6: Final answer
    x = 129,793.73

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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.