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Finding the Fourth Proportional to 103,787.10, 155,352.60 and 74,262.60

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Solution

The fourth proportional to 103,787.10, 155,352.60 and 74,262.60 is: 111,159.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,787.10 : 155,352.60 = 74,262.60 : x
  2. Step 2: Convert to fraction form
    103,787.10/155,352.60 = 74,262.60/x
  3. Step 3: Cross multiply
    103,787.10x = 155,352.60 × 74,262.60
  4. Step 4: Simplify right side
    103,787.10x = 11,536,887,992.76
  5. Step 5: Solve for x
    x = 11,536,887,992.76/103,787.10
  6. Step 6: Final answer
    x = 111,159.17

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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.