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Finding the Fourth Proportional to 85,331.70, 127,893.74 and 60,378.93

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Solution

The fourth proportional to 85,331.70, 127,893.74 and 60,378.93 is: 90,494.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,331.70 : 127,893.74 = 60,378.93 : x
  2. Step 2: Convert to fraction form
    85,331.70/127,893.74 = 60,378.93/x
  3. Step 3: Cross multiply
    85,331.70x = 127,893.74 × 60,378.93
  4. Step 4: Simplify right side
    85,331.70x = 7,722,086,873.00
  5. Step 5: Solve for x
    x = 7,722,086,873.00/85,331.70
  6. Step 6: Final answer
    x = 90,494.94

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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.