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Finding the Fourth Proportional to 85,805.28, 128,707.12 and 23,475.68

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Solution

The fourth proportional to 85,805.28, 128,707.12 and 23,475.68 is: 35,213.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,805.28 : 128,707.12 = 23,475.68 : x
  2. Step 2: Convert to fraction form
    85,805.28/128,707.12 = 23,475.68/x
  3. Step 3: Cross multiply
    85,805.28x = 128,707.12 × 23,475.68
  4. Step 4: Simplify right side
    85,805.28x = 3,021,487,162.84
  5. Step 5: Solve for x
    x = 3,021,487,162.84/85,805.28
  6. Step 6: Final answer
    x = 35,213.30

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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.