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Finding the Fourth Proportional to 80,359.83, 120,547.85 and 21,199.59

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Solution

The fourth proportional to 80,359.83, 120,547.85 and 21,199.59 is: 31,801.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,359.83 : 120,547.85 = 21,199.59 : x
  2. Step 2: Convert to fraction form
    80,359.83/120,547.85 = 21,199.59/x
  3. Step 3: Cross multiply
    80,359.83x = 120,547.85 × 21,199.59
  4. Step 4: Simplify right side
    80,359.83x = 2,555,564,889.38
  5. Step 5: Solve for x
    x = 2,555,564,889.38/80,359.83
  6. Step 6: Final answer
    x = 31,801.52

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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.