Home / 89,912.19-124,128.54-54,111

Finding the Fourth Proportional to 89,912.19, 124,128.54 and 54,111

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Solution

The fourth proportional to 89,912.19, 124,128.54 and 54,111 is: 74,703.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,912.19 : 124,128.54 = 54,111 : x
  2. Step 2: Convert to fraction form
    89,912.19/124,128.54 = 54,111/x
  3. Step 3: Cross multiply
    89,912.19x = 124,128.54 × 54,111
  4. Step 4: Simplify right side
    89,912.19x = 6,716,719,427.94
  5. Step 5: Solve for x
    x = 6,716,719,427.94/89,912.19
  6. Step 6: Final answer
    x = 74,703.10

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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.