Home / 425,639.57-638,552.79-126,143.64

Finding the Fourth Proportional to 425,639.57, 638,552.79 and 126,143.64

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Solution

The fourth proportional to 425,639.57, 638,552.79 and 126,143.64 is: 189,243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,639.57 : 638,552.79 = 126,143.64 : x
  2. Step 2: Convert to fraction form
    425,639.57/638,552.79 = 126,143.64/x
  3. Step 3: Cross multiply
    425,639.57x = 638,552.79 × 126,143.64
  4. Step 4: Simplify right side
    425,639.57x = 80,549,373,262.76
  5. Step 5: Solve for x
    x = 80,549,373,262.76/425,639.57
  6. Step 6: Final answer
    x = 189,243.15

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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.