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Finding the Fourth Proportional to 215,188.16, 322,793.71 and 65,416.93

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Solution

The fourth proportional to 215,188.16, 322,793.71 and 65,416.93 is: 98,128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,188.16 : 322,793.71 = 65,416.93 : x
  2. Step 2: Convert to fraction form
    215,188.16/322,793.71 = 65,416.93/x
  3. Step 3: Cross multiply
    215,188.16x = 322,793.71 × 65,416.93
  4. Step 4: Simplify right side
    215,188.16x = 21,116,172,560.98
  5. Step 5: Solve for x
    x = 21,116,172,560.98/215,188.16
  6. Step 6: Final answer
    x = 98,128.88

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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.