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Finding the Fourth Proportional to 55,139.50, 76,092.60 and 29,989

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Solution

The fourth proportional to 55,139.50, 76,092.60 and 29,989 is: 41,384.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,139.50 : 76,092.60 = 29,989 : x
  2. Step 2: Convert to fraction form
    55,139.50/76,092.60 = 29,989/x
  3. Step 3: Cross multiply
    55,139.50x = 76,092.60 × 29,989
  4. Step 4: Simplify right side
    55,139.50x = 2,281,940,981.40
  5. Step 5: Solve for x
    x = 2,281,940,981.40/55,139.50
  6. Step 6: Final answer
    x = 41,384.87

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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.