Home / 129,075.41-178,126.20-71,719.85

Finding the Fourth Proportional to 129,075.41, 178,126.20 and 71,719.85

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Solution

The fourth proportional to 129,075.41, 178,126.20 and 71,719.85 is: 98,974.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,075.41 : 178,126.20 = 71,719.85 : x
  2. Step 2: Convert to fraction form
    129,075.41/178,126.20 = 71,719.85/x
  3. Step 3: Cross multiply
    129,075.41x = 178,126.20 × 71,719.85
  4. Step 4: Simplify right side
    129,075.41x = 12,775,183,454.44
  5. Step 5: Solve for x
    x = 12,775,183,454.44/129,075.41
  6. Step 6: Final answer
    x = 98,974.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.