Home / 80,725.37-121,088.73-28,134.77

Finding the Fourth Proportional to 80,725.37, 121,088.73 and 28,134.77

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Solution

The fourth proportional to 80,725.37, 121,088.73 and 28,134.77 is: 42,202.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,725.37 : 121,088.73 = 28,134.77 : x
  2. Step 2: Convert to fraction form
    80,725.37/121,088.73 = 28,134.77/x
  3. Step 3: Cross multiply
    80,725.37x = 121,088.73 × 28,134.77
  4. Step 4: Simplify right side
    80,725.37x = 3,406,803,568.14
  5. Step 5: Solve for x
    x = 3,406,803,568.14/80,725.37
  6. Step 6: Final answer
    x = 42,202.39

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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.