Home / 74,991.45-112,360.82-45,318.72

Finding the Fourth Proportional to 74,991.45, 112,360.82 and 45,318.72

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Solution

The fourth proportional to 74,991.45, 112,360.82 and 45,318.72 is: 67,901.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,991.45 : 112,360.82 = 45,318.72 : x
  2. Step 2: Convert to fraction form
    74,991.45/112,360.82 = 45,318.72/x
  3. Step 3: Cross multiply
    74,991.45x = 112,360.82 × 45,318.72
  4. Step 4: Simplify right side
    74,991.45x = 5,092,048,313.96
  5. Step 5: Solve for x
    x = 5,092,048,313.96/74,991.45
  6. Step 6: Final answer
    x = 67,901.72

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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.