Home / 100,101.72-138,080.35-66,110.28

Finding the Fourth Proportional to 100,101.72, 138,080.35 and 66,110.28

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Solution

The fourth proportional to 100,101.72, 138,080.35 and 66,110.28 is: 91,192.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,101.72 : 138,080.35 = 66,110.28 : x
  2. Step 2: Convert to fraction form
    100,101.72/138,080.35 = 66,110.28/x
  3. Step 3: Cross multiply
    100,101.72x = 138,080.35 × 66,110.28
  4. Step 4: Simplify right side
    100,101.72x = 9,128,529,793.96
  5. Step 5: Solve for x
    x = 9,128,529,793.96/100,101.72
  6. Step 6: Final answer
    x = 91,192.53

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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.