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Finding the Fourth Proportional to 85,224.40, 127,740.60 and 40,872.40

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Solution

The fourth proportional to 85,224.40, 127,740.60 and 40,872.40 is: 61,262.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,224.40 : 127,740.60 = 40,872.40 : x
  2. Step 2: Convert to fraction form
    85,224.40/127,740.60 = 40,872.40/x
  3. Step 3: Cross multiply
    85,224.40x = 127,740.60 × 40,872.40
  4. Step 4: Simplify right side
    85,224.40x = 5,221,064,899.44
  5. Step 5: Solve for x
    x = 5,221,064,899.44/85,224.40
  6. Step 6: Final answer
    x = 61,262.56

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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.