Home / 100,220.30-138,298.10-54,889.25

Finding the Fourth Proportional to 100,220.30, 138,298.10 and 54,889.25

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Solution

The fourth proportional to 100,220.30, 138,298.10 and 54,889.25 is: 75,743.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,220.30 : 138,298.10 = 54,889.25 : x
  2. Step 2: Convert to fraction form
    100,220.30/138,298.10 = 54,889.25/x
  3. Step 3: Cross multiply
    100,220.30x = 138,298.10 × 54,889.25
  4. Step 4: Simplify right side
    100,220.30x = 7,591,078,985.43
  5. Step 5: Solve for x
    x = 7,591,078,985.43/100,220.30
  6. Step 6: Final answer
    x = 75,743.93

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1.5x scale

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.