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Finding the Fourth Proportional to 76,908.66, 106,129.88 and 43,372.50

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Solution

The fourth proportional to 76,908.66, 106,129.88 and 43,372.50 is: 59,851.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,908.66 : 106,129.88 = 43,372.50 : x
  2. Step 2: Convert to fraction form
    76,908.66/106,129.88 = 43,372.50/x
  3. Step 3: Cross multiply
    76,908.66x = 106,129.88 × 43,372.50
  4. Step 4: Simplify right side
    76,908.66x = 4,603,118,220.30
  5. Step 5: Solve for x
    x = 4,603,118,220.30/76,908.66
  6. Step 6: Final answer
    x = 59,851.75

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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.