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Finding the Fourth Proportional to 215,570.70, 323,404.65 and 65,817.90

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Solution

The fourth proportional to 215,570.70, 323,404.65 and 65,817.90 is: 98,741.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,570.70 : 323,404.65 = 65,817.90 : x
  2. Step 2: Convert to fraction form
    215,570.70/323,404.65 = 65,817.90/x
  3. Step 3: Cross multiply
    215,570.70x = 323,404.65 × 65,817.90
  4. Step 4: Simplify right side
    215,570.70x = 21,285,814,913.24
  5. Step 5: Solve for x
    x = 21,285,814,913.24/215,570.70
  6. Step 6: Final answer
    x = 98,741.69

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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.