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Finding the Fourth Proportional to 89,999.75, 135,081.34 and 47,914.99

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Solution

The fourth proportional to 89,999.75, 135,081.34 and 47,914.99 is: 71,915.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,999.75 : 135,081.34 = 47,914.99 : x
  2. Step 2: Convert to fraction form
    89,999.75/135,081.34 = 47,914.99/x
  3. Step 3: Cross multiply
    89,999.75x = 135,081.34 × 47,914.99
  4. Step 4: Simplify right side
    89,999.75x = 6,472,420,597.80
  5. Step 5: Solve for x
    x = 6,472,420,597.80/89,999.75
  6. Step 6: Final answer
    x = 71,915.98

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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.