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Finding the Fourth Proportional to 104,062.89, 143,487.08 and 76,878.31

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Solution

The fourth proportional to 104,062.89, 143,487.08 and 76,878.31 is: 106,003.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,062.89 : 143,487.08 = 76,878.31 : x
  2. Step 2: Convert to fraction form
    104,062.89/143,487.08 = 76,878.31/x
  3. Step 3: Cross multiply
    104,062.89x = 143,487.08 × 76,878.31
  4. Step 4: Simplify right side
    104,062.89x = 11,031,044,217.23
  5. Step 5: Solve for x
    x = 11,031,044,217.23/104,062.89
  6. Step 6: Final answer
    x = 106,003.63

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1.5x scale

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.