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Finding the Fourth Proportional to 70,641.82, 105,921.66 and 28,487.38

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Solution

The fourth proportional to 70,641.82, 105,921.66 and 28,487.38 is: 42,714.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,641.82 : 105,921.66 = 28,487.38 : x
  2. Step 2: Convert to fraction form
    70,641.82/105,921.66 = 28,487.38/x
  3. Step 3: Cross multiply
    70,641.82x = 105,921.66 × 28,487.38
  4. Step 4: Simplify right side
    70,641.82x = 3,017,430,578.65
  5. Step 5: Solve for x
    x = 3,017,430,578.65/70,641.82
  6. Step 6: Final answer
    x = 42,714.51

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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.