Home / 100,529.52-138,725.31-57,509.85

Finding the Fourth Proportional to 100,529.52, 138,725.31 and 57,509.85

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Solution

The fourth proportional to 100,529.52, 138,725.31 and 57,509.85 is: 79,360.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,529.52 : 138,725.31 = 57,509.85 : x
  2. Step 2: Convert to fraction form
    100,529.52/138,725.31 = 57,509.85/x
  3. Step 3: Cross multiply
    100,529.52x = 138,725.31 × 57,509.85
  4. Step 4: Simplify right side
    100,529.52x = 7,978,071,769.30
  5. Step 5: Solve for x
    x = 7,978,071,769.30/100,529.52
  6. Step 6: Final answer
    x = 79,360.49

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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.