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Finding the Fourth Proportional to 66,440.40, 99,660.60 and 34,807.20

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Solution

The fourth proportional to 66,440.40, 99,660.60 and 34,807.20 is: 52,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440.40 : 99,660.60 = 34,807.20 : x
  2. Step 2: Convert to fraction form
    66,440.40/99,660.60 = 34,807.20/x
  3. Step 3: Cross multiply
    66,440.40x = 99,660.60 × 34,807.20
  4. Step 4: Simplify right side
    66,440.40x = 3,468,906,436.32
  5. Step 5: Solve for x
    x = 3,468,906,436.32/66,440.40
  6. Step 6: Final answer
    x = 52,210.80

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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.