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Finding the Fourth Proportional to 220,807.30, 331,259.82 and 80,565.52

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Solution

The fourth proportional to 220,807.30, 331,259.82 and 80,565.52 is: 120,866.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,807.30 : 331,259.82 = 80,565.52 : x
  2. Step 2: Convert to fraction form
    220,807.30/331,259.82 = 80,565.52/x
  3. Step 3: Cross multiply
    220,807.30x = 331,259.82 × 80,565.52
  4. Step 4: Simplify right side
    220,807.30x = 26,688,119,653.41
  5. Step 5: Solve for x
    x = 26,688,119,653.41/220,807.30
  6. Step 6: Final answer
    x = 120,866.11

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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.