Home / 85,742.30-128,613.45-57,748.70

Finding the Fourth Proportional to 85,742.30, 128,613.45 and 57,748.70

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Solution

The fourth proportional to 85,742.30, 128,613.45 and 57,748.70 is: 86,623.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,742.30 : 128,613.45 = 57,748.70 : x
  2. Step 2: Convert to fraction form
    85,742.30/128,613.45 = 57,748.70/x
  3. Step 3: Cross multiply
    85,742.30x = 128,613.45 × 57,748.70
  4. Step 4: Simplify right side
    85,742.30x = 7,427,259,540.02
  5. Step 5: Solve for x
    x = 7,427,259,540.02/85,742.30
  6. Step 6: Final answer
    x = 86,623.05

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.