Home / 78,128.49-117,348.40-73,722.10

Finding the Fourth Proportional to 78,128.49, 117,348.40 and 73,722.10

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Solution

The fourth proportional to 78,128.49, 117,348.40 and 73,722.10 is: 110,730.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,128.49 : 117,348.40 = 73,722.10 : x
  2. Step 2: Convert to fraction form
    78,128.49/117,348.40 = 73,722.10/x
  3. Step 3: Cross multiply
    78,128.49x = 117,348.40 × 73,722.10
  4. Step 4: Simplify right side
    78,128.49x = 8,651,170,479.64
  5. Step 5: Solve for x
    x = 8,651,170,479.64/78,128.49
  6. Step 6: Final answer
    x = 110,730.04

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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.