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Finding the Fourth Proportional to 103,886.70, 155,902.95 and 66,537.60

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Solution

The fourth proportional to 103,886.70, 155,902.95 and 66,537.60 is: 99,853.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,886.70 : 155,902.95 = 66,537.60 : x
  2. Step 2: Convert to fraction form
    103,886.70/155,902.95 = 66,537.60/x
  3. Step 3: Cross multiply
    103,886.70x = 155,902.95 × 66,537.60
  4. Step 4: Simplify right side
    103,886.70x = 10,373,408,125.92
  5. Step 5: Solve for x
    x = 10,373,408,125.92/103,886.70
  6. Step 6: Final answer
    x = 99,853.09

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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.