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Finding the Fourth Proportional to 85,598.75, 128,398.53 and 30,194.75

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Solution

The fourth proportional to 85,598.75, 128,398.53 and 30,194.75 is: 45,292.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,598.75 : 128,398.53 = 30,194.75 : x
  2. Step 2: Convert to fraction form
    85,598.75/128,398.53 = 30,194.75/x
  3. Step 3: Cross multiply
    85,598.75x = 128,398.53 × 30,194.75
  4. Step 4: Simplify right side
    85,598.75x = 3,876,961,513.72
  5. Step 5: Solve for x
    x = 3,876,961,513.72/85,598.75
  6. Step 6: Final answer
    x = 45,292.27

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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.