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Finding the Fourth Proportional to 215,780.80, 323,669.44 and 66,020.48

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Solution

The fourth proportional to 215,780.80, 323,669.44 and 66,020.48 is: 99,030.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,780.80 : 323,669.44 = 66,020.48 : x
  2. Step 2: Convert to fraction form
    215,780.80/323,669.44 = 66,020.48/x
  3. Step 3: Cross multiply
    215,780.80x = 323,669.44 × 66,020.48
  4. Step 4: Simplify right side
    215,780.80x = 21,368,811,790.13
  5. Step 5: Solve for x
    x = 21,368,811,790.13/215,780.80
  6. Step 6: Final answer
    x = 99,030.18

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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.