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Finding the Fourth Proportional to 45,152.62, 67,752.16 and 21,487

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Solution

The fourth proportional to 45,152.62, 67,752.16 and 21,487 is: 32,241.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,152.62 : 67,752.16 = 21,487 : x
  2. Step 2: Convert to fraction form
    45,152.62/67,752.16 = 21,487/x
  3. Step 3: Cross multiply
    45,152.62x = 67,752.16 × 21,487
  4. Step 4: Simplify right side
    45,152.62x = 1,455,790,661.92
  5. Step 5: Solve for x
    x = 1,455,790,661.92/45,152.62
  6. Step 6: Final answer
    x = 32,241.55

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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.