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Finding the Fourth Proportional to 90,821.60, 136,232.40 and 90,821.60

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Solution

The fourth proportional to 90,821.60, 136,232.40 and 90,821.60 is: 136,232.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,821.60 : 136,232.40 = 90,821.60 : x
  2. Step 2: Convert to fraction form
    90,821.60/136,232.40 = 90,821.60/x
  3. Step 3: Cross multiply
    90,821.60x = 136,232.40 × 90,821.60
  4. Step 4: Simplify right side
    90,821.60x = 12,372,844,539.84
  5. Step 5: Solve for x
    x = 12,372,844,539.84/90,821.60
  6. Step 6: Final answer
    x = 136,232.40

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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.