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Finding the Fourth Proportional to 85,010.40, 127,515.60 and 79,761.60

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Solution

The fourth proportional to 85,010.40, 127,515.60 and 79,761.60 is: 119,642.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,010.40 : 127,515.60 = 79,761.60 : x
  2. Step 2: Convert to fraction form
    85,010.40/127,515.60 = 79,761.60/x
  3. Step 3: Cross multiply
    85,010.40x = 127,515.60 × 79,761.60
  4. Step 4: Simplify right side
    85,010.40x = 10,170,848,280.96
  5. Step 5: Solve for x
    x = 10,170,848,280.96/85,010.40
  6. Step 6: Final answer
    x = 119,642.40

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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.