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Finding the Fourth Proportional to 74,976.67, 112,409.45 and 45,387.51

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Solution

The fourth proportional to 74,976.67, 112,409.45 and 45,387.51 is: 68,047.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,976.67 : 112,409.45 = 45,387.51 : x
  2. Step 2: Convert to fraction form
    74,976.67/112,409.45 = 45,387.51/x
  3. Step 3: Cross multiply
    74,976.67x = 112,409.45 × 45,387.51
  4. Step 4: Simplify right side
    74,976.67x = 5,101,985,035.97
  5. Step 5: Solve for x
    x = 5,101,985,035.97/74,976.67
  6. Step 6: Final answer
    x = 68,047.63

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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.