Home / 100,153.43-138,211.77-54,834.35

Finding the Fourth Proportional to 100,153.43, 138,211.77 and 54,834.35

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Solution

The fourth proportional to 100,153.43, 138,211.77 and 54,834.35 is: 75,671.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,153.43 : 138,211.77 = 54,834.35 : x
  2. Step 2: Convert to fraction form
    100,153.43/138,211.77 = 54,834.35/x
  3. Step 3: Cross multiply
    100,153.43x = 138,211.77 × 54,834.35
  4. Step 4: Simplify right side
    100,153.43x = 7,578,751,879.24
  5. Step 5: Solve for x
    x = 7,578,751,879.24/100,153.43
  6. Step 6: Final answer
    x = 75,671.42

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1.5x scale

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.