Home / 420,981.66-631,572.09-136,671.66

Finding the Fourth Proportional to 420,981.66, 631,572.09 and 136,671.66

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Solution

The fourth proportional to 420,981.66, 631,572.09 and 136,671.66 is: 205,039.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,981.66 : 631,572.09 = 136,671.66 : x
  2. Step 2: Convert to fraction form
    420,981.66/631,572.09 = 136,671.66/x
  3. Step 3: Cross multiply
    420,981.66x = 631,572.09 × 136,671.66
  4. Step 4: Simplify right side
    420,981.66x = 86,318,005,949.97
  5. Step 5: Solve for x
    x = 86,318,005,949.97/420,981.66
  6. Step 6: Final answer
    x = 205,039.83

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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.