Home / 425,621.40-638,525.52-126,125.40

Finding the Fourth Proportional to 425,621.40, 638,525.52 and 126,125.40

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Solution

The fourth proportional to 425,621.40, 638,525.52 and 126,125.40 is: 189,215.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,621.40 : 638,525.52 = 126,125.40 : x
  2. Step 2: Convert to fraction form
    425,621.40/638,525.52 = 126,125.40/x
  3. Step 3: Cross multiply
    425,621.40x = 638,525.52 × 126,125.40
  4. Step 4: Simplify right side
    425,621.40x = 80,534,286,620.21
  5. Step 5: Solve for x
    x = 80,534,286,620.21/425,621.40
  6. Step 6: Final answer
    x = 189,215.78

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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.