Home / 99,959.09-137,939.55-54,638.66

Finding the Fourth Proportional to 99,959.09, 137,939.55 and 54,638.66

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Solution

The fourth proportional to 99,959.09, 137,939.55 and 54,638.66 is: 75,399.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,959.09 : 137,939.55 = 54,638.66 : x
  2. Step 2: Convert to fraction form
    99,959.09/137,939.55 = 54,638.66/x
  3. Step 3: Cross multiply
    99,959.09x = 137,939.55 × 54,638.66
  4. Step 4: Simplify right side
    99,959.09x = 7,536,831,483.31
  5. Step 5: Solve for x
    x = 7,536,831,483.31/99,959.09
  6. Step 6: Final answer
    x = 75,399.16

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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.