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Finding the Fourth Proportional to 103,690.02, 155,346.14 and 72,033.14

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Solution

The fourth proportional to 103,690.02, 155,346.14 and 72,033.14 is: 107,918.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,690.02 : 155,346.14 = 72,033.14 : x
  2. Step 2: Convert to fraction form
    103,690.02/155,346.14 = 72,033.14/x
  3. Step 3: Cross multiply
    103,690.02x = 155,346.14 × 72,033.14
  4. Step 4: Simplify right side
    103,690.02x = 11,190,070,251.08
  5. Step 5: Solve for x
    x = 11,190,070,251.08/103,690.02
  6. Step 6: Final answer
    x = 107,918.49

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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.