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Finding the Fourth Proportional to 215,903.36, 323,876.72 and 66,141.92

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Solution

The fourth proportional to 215,903.36, 323,876.72 and 66,141.92 is: 99,219.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,903.36 : 323,876.72 = 66,141.92 : x
  2. Step 2: Convert to fraction form
    215,903.36/323,876.72 = 66,141.92/x
  3. Step 3: Cross multiply
    215,903.36x = 323,876.72 × 66,141.92
  4. Step 4: Simplify right side
    215,903.36x = 21,421,828,104.10
  5. Step 5: Solve for x
    x = 21,421,828,104.10/215,903.36
  6. Step 6: Final answer
    x = 99,219.52

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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.