Home / 155,138.64-214,078.68-87,151.92

Finding the Fourth Proportional to 155,138.64, 214,078.68 and 87,151.92

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Solution

The fourth proportional to 155,138.64, 214,078.68 and 87,151.92 is: 120,262.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,138.64 : 214,078.68 = 87,151.92 : x
  2. Step 2: Convert to fraction form
    155,138.64/214,078.68 = 87,151.92/x
  3. Step 3: Cross multiply
    155,138.64x = 214,078.68 × 87,151.92
  4. Step 4: Simplify right side
    155,138.64x = 18,657,367,993.07
  5. Step 5: Solve for x
    x = 18,657,367,993.07/155,138.64
  6. Step 6: Final answer
    x = 120,262.55

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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.