Home / 99,985.49-137,983.35-54,662.57

Finding the Fourth Proportional to 99,985.49, 137,983.35 and 54,662.57

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Solution

The fourth proportional to 99,985.49, 137,983.35 and 54,662.57 is: 75,436.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,985.49 : 137,983.35 = 54,662.57 : x
  2. Step 2: Convert to fraction form
    99,985.49/137,983.35 = 54,662.57/x
  3. Step 3: Cross multiply
    99,985.49x = 137,983.35 × 54,662.57
  4. Step 4: Simplify right side
    99,985.49x = 7,542,524,528.21
  5. Step 5: Solve for x
    x = 7,542,524,528.21/99,985.49
  6. Step 6: Final answer
    x = 75,436.19

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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.