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Finding the Fourth Proportional to 71,914.37, 99,015.99 and 61,138.04

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Solution

The fourth proportional to 71,914.37, 99,015.99 and 61,138.04 is: 84,178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,914.37 : 99,015.99 = 61,138.04 : x
  2. Step 2: Convert to fraction form
    71,914.37/99,015.99 = 61,138.04/x
  3. Step 3: Cross multiply
    71,914.37x = 99,015.99 × 61,138.04
  4. Step 4: Simplify right side
    71,914.37x = 6,053,643,557.26
  5. Step 5: Solve for x
    x = 6,053,643,557.26/71,914.37
  6. Step 6: Final answer
    x = 84,178.50

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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.