Home / 100,156.91-138,216.65-54,835.25

Finding the Fourth Proportional to 100,156.91, 138,216.65 and 54,835.25

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Solution

The fourth proportional to 100,156.91, 138,216.65 and 54,835.25 is: 75,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,156.91 : 138,216.65 = 54,835.25 : x
  2. Step 2: Convert to fraction form
    100,156.91/138,216.65 = 54,835.25/x
  3. Step 3: Cross multiply
    100,156.91x = 138,216.65 × 54,835.25
  4. Step 4: Simplify right side
    100,156.91x = 7,579,143,591.65
  5. Step 5: Solve for x
    x = 7,579,143,591.65/100,156.91
  6. Step 6: Final answer
    x = 75,672.70

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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.