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Finding the Fourth Proportional to 71,994.36, 99,325.80 and 45,138

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Solution

The fourth proportional to 71,994.36, 99,325.80 and 45,138 is: 62,273.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994.36 : 99,325.80 = 45,138 : x
  2. Step 2: Convert to fraction form
    71,994.36/99,325.80 = 45,138/x
  3. Step 3: Cross multiply
    71,994.36x = 99,325.80 × 45,138
  4. Step 4: Simplify right side
    71,994.36x = 4,483,367,960.40
  5. Step 5: Solve for x
    x = 4,483,367,960.40/71,994.36
  6. Step 6: Final answer
    x = 62,273.88

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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.