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Finding the Fourth Proportional to 100,672.70, 150,879.45 and 77,182.70

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Solution

The fourth proportional to 100,672.70, 150,879.45 and 77,182.70 is: 115,674.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,672.70 : 150,879.45 = 77,182.70 : x
  2. Step 2: Convert to fraction form
    100,672.70/150,879.45 = 77,182.70/x
  3. Step 3: Cross multiply
    100,672.70x = 150,879.45 × 77,182.70
  4. Step 4: Simplify right side
    100,672.70x = 11,645,283,325.52
  5. Step 5: Solve for x
    x = 11,645,283,325.52/100,672.70
  6. Step 6: Final answer
    x = 115,674.69

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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.