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Finding the Fourth Proportional to 215,611.16, 323,465.93 and 65,872.73

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Solution

The fourth proportional to 215,611.16, 323,465.93 and 65,872.73 is: 98,824.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,611.16 : 323,465.93 = 65,872.73 : x
  2. Step 2: Convert to fraction form
    215,611.16/323,465.93 = 65,872.73/x
  3. Step 3: Cross multiply
    215,611.16x = 323,465.93 × 65,872.73
  4. Step 4: Simplify right side
    215,611.16x = 21,307,581,924.40
  5. Step 5: Solve for x
    x = 21,307,581,924.40/215,611.16
  6. Step 6: Final answer
    x = 98,824.12

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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.