Home / 100,250.08-138,029.52-85,112.80

Finding the Fourth Proportional to 100,250.08, 138,029.52 and 85,112.80

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Solution

The fourth proportional to 100,250.08, 138,029.52 and 85,112.80 is: 117,187.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,250.08 : 138,029.52 = 85,112.80 : x
  2. Step 2: Convert to fraction form
    100,250.08/138,029.52 = 85,112.80/x
  3. Step 3: Cross multiply
    100,250.08x = 138,029.52 × 85,112.80
  4. Step 4: Simplify right side
    100,250.08x = 11,748,078,929.86
  5. Step 5: Solve for x
    x = 11,748,078,929.86/100,250.08
  6. Step 6: Final answer
    x = 117,187.73

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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.