Home / 78,639.46-117,990.51-28,722.94

Finding the Fourth Proportional to 78,639.46, 117,990.51 and 28,722.94

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Solution

The fourth proportional to 78,639.46, 117,990.51 and 28,722.94 is: 43,095.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639.46 : 117,990.51 = 28,722.94 : x
  2. Step 2: Convert to fraction form
    78,639.46/117,990.51 = 28,722.94/x
  3. Step 3: Cross multiply
    78,639.46x = 117,990.51 × 28,722.94
  4. Step 4: Simplify right side
    78,639.46x = 3,389,034,339.30
  5. Step 5: Solve for x
    x = 3,389,034,339.30/78,639.46
  6. Step 6: Final answer
    x = 43,095.85

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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.