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Finding the Fourth Proportional to 80,587.98, 120,930.57 and 64,005.66

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Solution

The fourth proportional to 80,587.98, 120,930.57 and 64,005.66 is: 96,047.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,587.98 : 120,930.57 = 64,005.66 : x
  2. Step 2: Convert to fraction form
    80,587.98/120,930.57 = 64,005.66/x
  3. Step 3: Cross multiply
    80,587.98x = 120,930.57 × 64,005.66
  4. Step 4: Simplify right side
    80,587.98x = 7,740,240,947.03
  5. Step 5: Solve for x
    x = 7,740,240,947.03/80,587.98
  6. Step 6: Final answer
    x = 96,047.09

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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.