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Finding the Fourth Proportional to 74,976.05, 112,408.51 and 45,386.88

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Solution

The fourth proportional to 74,976.05, 112,408.51 and 45,386.88 is: 68,046.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,976.05 : 112,408.51 = 45,386.88 : x
  2. Step 2: Convert to fraction form
    74,976.05/112,408.51 = 45,386.88/x
  3. Step 3: Cross multiply
    74,976.05x = 112,408.51 × 45,386.88
  4. Step 4: Simplify right side
    74,976.05x = 5,101,871,554.35
  5. Step 5: Solve for x
    x = 5,101,871,554.35/74,976.05
  6. Step 6: Final answer
    x = 68,046.68

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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.