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Finding the Fourth Proportional to 85,487.74, 128,238.90 and 22,316.24

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Solution

The fourth proportional to 85,487.74, 128,238.90 and 22,316.24 is: 33,476.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,487.74 : 128,238.90 = 22,316.24 : x
  2. Step 2: Convert to fraction form
    85,487.74/128,238.90 = 22,316.24/x
  3. Step 3: Cross multiply
    85,487.74x = 128,238.90 × 22,316.24
  4. Step 4: Simplify right side
    85,487.74x = 2,861,810,306.65
  5. Step 5: Solve for x
    x = 2,861,810,306.65/85,487.74
  6. Step 6: Final answer
    x = 33,476.27

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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.