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Finding the Fourth Proportional to 215,130.82, 322,737.27 and 81,999.94

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Solution

The fourth proportional to 215,130.82, 322,737.27 and 81,999.94 is: 123,015.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,130.82 : 322,737.27 = 81,999.94 : x
  2. Step 2: Convert to fraction form
    215,130.82/322,737.27 = 81,999.94/x
  3. Step 3: Cross multiply
    215,130.82x = 322,737.27 × 81,999.94
  4. Step 4: Simplify right side
    215,130.82x = 26,464,436,775.76
  5. Step 5: Solve for x
    x = 26,464,436,775.76/215,130.82
  6. Step 6: Final answer
    x = 123,015.55

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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.