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Finding the Fourth Proportional to 86,529.80, 120,846.47 and 86,529.80

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Solution

The fourth proportional to 86,529.80, 120,846.47 and 86,529.80 is: 120,846.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,529.80 : 120,846.47 = 86,529.80 : x
  2. Step 2: Convert to fraction form
    86,529.80/120,846.47 = 86,529.80/x
  3. Step 3: Cross multiply
    86,529.80x = 120,846.47 × 86,529.80
  4. Step 4: Simplify right side
    86,529.80x = 10,456,820,879.81
  5. Step 5: Solve for x
    x = 10,456,820,879.81/86,529.80
  6. Step 6: Final answer
    x = 120,846.47

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.