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Finding the Fourth Proportional to 73,999.90, 102,131.92 and 55,005.80

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Solution

The fourth proportional to 73,999.90, 102,131.92 and 55,005.80 is: 75,916.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,999.90 : 102,131.92 = 55,005.80 : x
  2. Step 2: Convert to fraction form
    73,999.90/102,131.92 = 55,005.80/x
  3. Step 3: Cross multiply
    73,999.90x = 102,131.92 × 55,005.80
  4. Step 4: Simplify right side
    73,999.90x = 5,617,847,690.11
  5. Step 5: Solve for x
    x = 5,617,847,690.11/73,999.90
  6. Step 6: Final answer
    x = 75,916.97

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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.