Home / 78,621.72-117,936.84-22,457.40

Finding the Fourth Proportional to 78,621.72, 117,936.84 and 22,457.40

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Solution

The fourth proportional to 78,621.72, 117,936.84 and 22,457.40 is: 33,687.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,621.72 : 117,936.84 = 22,457.40 : x
  2. Step 2: Convert to fraction form
    78,621.72/117,936.84 = 22,457.40/x
  3. Step 3: Cross multiply
    78,621.72x = 117,936.84 × 22,457.40
  4. Step 4: Simplify right side
    78,621.72x = 2,648,554,790.62
  5. Step 5: Solve for x
    x = 2,648,554,790.62/78,621.72
  6. Step 6: Final answer
    x = 33,687.32

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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.