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Finding the Fourth Proportional to 66,539.40, 99,809.10 and 40,295.40

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Solution

The fourth proportional to 66,539.40, 99,809.10 and 40,295.40 is: 60,443.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,539.40 : 99,809.10 = 40,295.40 : x
  2. Step 2: Convert to fraction form
    66,539.40/99,809.10 = 40,295.40/x
  3. Step 3: Cross multiply
    66,539.40x = 99,809.10 × 40,295.40
  4. Step 4: Simplify right side
    66,539.40x = 4,021,847,608.14
  5. Step 5: Solve for x
    x = 4,021,847,608.14/66,539.40
  6. Step 6: Final answer
    x = 60,443.10

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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.