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Finding the Fourth Proportional to 61,137.20, 91,705.80 and 53,361.20

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Solution

The fourth proportional to 61,137.20, 91,705.80 and 53,361.20 is: 80,041.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,137.20 : 91,705.80 = 53,361.20 : x
  2. Step 2: Convert to fraction form
    61,137.20/91,705.80 = 53,361.20/x
  3. Step 3: Cross multiply
    61,137.20x = 91,705.80 × 53,361.20
  4. Step 4: Simplify right side
    61,137.20x = 4,893,531,534.96
  5. Step 5: Solve for x
    x = 4,893,531,534.96/61,137.20
  6. Step 6: Final answer
    x = 80,041.80

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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.