Home / 64,901.12-97,361.22-20,517.80

Finding the Fourth Proportional to 64,901.12, 97,361.22 and 20,517.80

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Solution

The fourth proportional to 64,901.12, 97,361.22 and 20,517.80 is: 30,779.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,901.12 : 97,361.22 = 20,517.80 : x
  2. Step 2: Convert to fraction form
    64,901.12/97,361.22 = 20,517.80/x
  3. Step 3: Cross multiply
    64,901.12x = 97,361.22 × 20,517.80
  4. Step 4: Simplify right side
    64,901.12x = 1,997,638,039.72
  5. Step 5: Solve for x
    x = 1,997,638,039.72/64,901.12
  6. Step 6: Final answer
    x = 30,779.72

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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.