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Finding the Fourth Proportional to 85,499.76, 128,249.68 and 23,170.26

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Solution

The fourth proportional to 85,499.76, 128,249.68 and 23,170.26 is: 34,755.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,499.76 : 128,249.68 = 23,170.26 : x
  2. Step 2: Convert to fraction form
    85,499.76/128,249.68 = 23,170.26/x
  3. Step 3: Cross multiply
    85,499.76x = 128,249.68 × 23,170.26
  4. Step 4: Simplify right side
    85,499.76x = 2,971,578,430.52
  5. Step 5: Solve for x
    x = 2,971,578,430.52/85,499.76
  6. Step 6: Final answer
    x = 34,755.40

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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.