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Finding the Fourth Proportional to 71,919.68, 99,231.90 and 46,420.65

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Solution

The fourth proportional to 71,919.68, 99,231.90 and 46,420.65 is: 64,049.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,919.68 : 99,231.90 = 46,420.65 : x
  2. Step 2: Convert to fraction form
    71,919.68/99,231.90 = 46,420.65/x
  3. Step 3: Cross multiply
    71,919.68x = 99,231.90 × 46,420.65
  4. Step 4: Simplify right side
    71,919.68x = 4,606,408,802.58
  5. Step 5: Solve for x
    x = 4,606,408,802.58/71,919.68
  6. Step 6: Final answer
    x = 64,049.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.