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Finding the Fourth Proportional to 74,885.84, 112,361.38 and 43,721.12

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Solution

The fourth proportional to 74,885.84, 112,361.38 and 43,721.12 is: 65,600.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,885.84 : 112,361.38 = 43,721.12 : x
  2. Step 2: Convert to fraction form
    74,885.84/112,361.38 = 43,721.12/x
  3. Step 3: Cross multiply
    74,885.84x = 112,361.38 × 43,721.12
  4. Step 4: Simplify right side
    74,885.84x = 4,912,565,378.35
  5. Step 5: Solve for x
    x = 4,912,565,378.35/74,885.84
  6. Step 6: Final answer
    x = 65,600.72

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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.