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Finding the Fourth Proportional to 71,936, 99,230.97 and 45,031.78

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Solution

The fourth proportional to 71,936, 99,230.97 and 45,031.78 is: 62,118.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,936 : 99,230.97 = 45,031.78 : x
  2. Step 2: Convert to fraction form
    71,936/99,230.97 = 45,031.78/x
  3. Step 3: Cross multiply
    71,936x = 99,230.97 × 45,031.78
  4. Step 4: Simplify right side
    71,936x = 4,468,547,210.23
  5. Step 5: Solve for x
    x = 4,468,547,210.23/71,936
  6. Step 6: Final answer
    x = 62,118.37

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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.