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Finding the Fourth Proportional to 215,814.60, 323,746.20 and 66,053.70

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Solution

The fourth proportional to 215,814.60, 323,746.20 and 66,053.70 is: 99,087.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,814.60 : 323,746.20 = 66,053.70 : x
  2. Step 2: Convert to fraction form
    215,814.60/323,746.20 = 66,053.70/x
  3. Step 3: Cross multiply
    215,814.60x = 323,746.20 × 66,053.70
  4. Step 4: Simplify right side
    215,814.60x = 21,384,634,370.94
  5. Step 5: Solve for x
    x = 21,384,634,370.94/215,814.60
  6. Step 6: Final answer
    x = 99,087.99

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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.