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Finding the Fourth Proportional to 84,165.60, 125,989.20 and 69,132

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Solution

The fourth proportional to 84,165.60, 125,989.20 and 69,132 is: 103,485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,165.60 : 125,989.20 = 69,132 : x
  2. Step 2: Convert to fraction form
    84,165.60/125,989.20 = 69,132/x
  3. Step 3: Cross multiply
    84,165.60x = 125,989.20 × 69,132
  4. Step 4: Simplify right side
    84,165.60x = 8,709,885,374.40
  5. Step 5: Solve for x
    x = 8,709,885,374.40/84,165.60
  6. Step 6: Final answer
    x = 103,485.10

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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.