Home / 100,100.88-138,083.76-64,250.64

Finding the Fourth Proportional to 100,100.88, 138,083.76 and 64,250.64

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Solution

The fourth proportional to 100,100.88, 138,083.76 and 64,250.64 is: 88,630.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,100.88 : 138,083.76 = 64,250.64 : x
  2. Step 2: Convert to fraction form
    100,100.88/138,083.76 = 64,250.64/x
  3. Step 3: Cross multiply
    100,100.88x = 138,083.76 × 64,250.64
  4. Step 4: Simplify right side
    100,100.88x = 8,871,969,953.61
  5. Step 5: Solve for x
    x = 8,871,969,953.61/100,100.88
  6. Step 6: Final answer
    x = 88,630.29

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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.