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Finding the Fourth Proportional to 66,580.80, 99,822.60 and 27,117.60

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Solution

The fourth proportional to 66,580.80, 99,822.60 and 27,117.60 is: 40,656.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,580.80 : 99,822.60 = 27,117.60 : x
  2. Step 2: Convert to fraction form
    66,580.80/99,822.60 = 27,117.60/x
  3. Step 3: Cross multiply
    66,580.80x = 99,822.60 × 27,117.60
  4. Step 4: Simplify right side
    66,580.80x = 2,706,949,337.76
  5. Step 5: Solve for x
    x = 2,706,949,337.76/66,580.80
  6. Step 6: Final answer
    x = 40,656.61

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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.