Home / 85,279.10-128,049.86-76,006.22

Finding the Fourth Proportional to 85,279.10, 128,049.86 and 76,006.22

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Solution

The fourth proportional to 85,279.10, 128,049.86 and 76,006.22 is: 114,126.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,279.10 : 128,049.86 = 76,006.22 : x
  2. Step 2: Convert to fraction form
    85,279.10/128,049.86 = 76,006.22/x
  3. Step 3: Cross multiply
    85,279.10x = 128,049.86 × 76,006.22
  4. Step 4: Simplify right side
    85,279.10x = 9,732,585,830.13
  5. Step 5: Solve for x
    x = 9,732,585,830.13/85,279.10
  6. Step 6: Final answer
    x = 114,126.27

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1.5x scale

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.