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Finding the Fourth Proportional to 136,915.70, 205,027.95 and 89,914.10

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Solution

The fourth proportional to 136,915.70, 205,027.95 and 89,914.10 is: 134,644.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,915.70 : 205,027.95 = 89,914.10 : x
  2. Step 2: Convert to fraction form
    136,915.70/205,027.95 = 89,914.10/x
  3. Step 3: Cross multiply
    136,915.70x = 205,027.95 × 89,914.10
  4. Step 4: Simplify right side
    136,915.70x = 18,434,903,599.10
  5. Step 5: Solve for x
    x = 18,434,903,599.10/136,915.70
  6. Step 6: Final answer
    x = 134,644.19

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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.