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Finding the Fourth Proportional to 103,886.20, 155,902.20 and 66,537.10

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Solution

The fourth proportional to 103,886.20, 155,902.20 and 66,537.10 is: 99,852.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,886.20 : 155,902.20 = 66,537.10 : x
  2. Step 2: Convert to fraction form
    103,886.20/155,902.20 = 66,537.10/x
  3. Step 3: Cross multiply
    103,886.20x = 155,902.20 × 66,537.10
  4. Step 4: Simplify right side
    103,886.20x = 10,373,280,271.62
  5. Step 5: Solve for x
    x = 10,373,280,271.62/103,886.20
  6. Step 6: Final answer
    x = 99,852.34

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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.