Home / 85,405.03-128,085.44-25,419.42

Finding the Fourth Proportional to 85,405.03, 128,085.44 and 25,419.42

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Solution

The fourth proportional to 85,405.03, 128,085.44 and 25,419.42 is: 38,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,405.03 : 128,085.44 = 25,419.42 : x
  2. Step 2: Convert to fraction form
    85,405.03/128,085.44 = 25,419.42/x
  3. Step 3: Cross multiply
    85,405.03x = 128,085.44 × 25,419.42
  4. Step 4: Simplify right side
    85,405.03x = 3,255,857,468.15
  5. Step 5: Solve for x
    x = 3,255,857,468.15/85,405.03
  6. Step 6: Final answer
    x = 38,122.55

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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.