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Finding the Fourth Proportional to 43,878.80, 65,818.20 and 40,941.20

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Solution

The fourth proportional to 43,878.80, 65,818.20 and 40,941.20 is: 61,411.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,878.80 : 65,818.20 = 40,941.20 : x
  2. Step 2: Convert to fraction form
    43,878.80/65,818.20 = 40,941.20/x
  3. Step 3: Cross multiply
    43,878.80x = 65,818.20 × 40,941.20
  4. Step 4: Simplify right side
    43,878.80x = 2,694,676,089.84
  5. Step 5: Solve for x
    x = 2,694,676,089.84/43,878.80
  6. Step 6: Final answer
    x = 61,411.80

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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.