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Finding the Fourth Proportional to 66,018.40, 98,893.20 and 40,981.60

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Solution

The fourth proportional to 66,018.40, 98,893.20 and 40,981.60 is: 61,388.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,018.40 : 98,893.20 = 40,981.60 : x
  2. Step 2: Convert to fraction form
    66,018.40/98,893.20 = 40,981.60/x
  3. Step 3: Cross multiply
    66,018.40x = 98,893.20 × 40,981.60
  4. Step 4: Simplify right side
    66,018.40x = 4,052,801,565.12
  5. Step 5: Solve for x
    x = 4,052,801,565.12/66,018.40
  6. Step 6: Final answer
    x = 61,388.97

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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.