Home / 100,235.08-138,008.82-85,097.80

Finding the Fourth Proportional to 100,235.08, 138,008.82 and 85,097.80

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Solution

The fourth proportional to 100,235.08, 138,008.82 and 85,097.80 is: 117,167.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,235.08 : 138,008.82 = 85,097.80 : x
  2. Step 2: Convert to fraction form
    100,235.08/138,008.82 = 85,097.80/x
  3. Step 3: Cross multiply
    100,235.08x = 138,008.82 × 85,097.80
  4. Step 4: Simplify right side
    100,235.08x = 11,744,246,962.60
  5. Step 5: Solve for x
    x = 11,744,246,962.60/100,235.08
  6. Step 6: Final answer
    x = 117,167.03

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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.