Home / 218,722.10-328,083.15-139,601.30

Finding the Fourth Proportional to 218,722.10, 328,083.15 and 139,601.30

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Solution

The fourth proportional to 218,722.10, 328,083.15 and 139,601.30 is: 209,401.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,722.10 : 328,083.15 = 139,601.30 : x
  2. Step 2: Convert to fraction form
    218,722.10/328,083.15 = 139,601.30/x
  3. Step 3: Cross multiply
    218,722.10x = 328,083.15 × 139,601.30
  4. Step 4: Simplify right side
    218,722.10x = 45,800,834,248.10
  5. Step 5: Solve for x
    x = 45,800,834,248.10/218,722.10
  6. Step 6: Final answer
    x = 209,401.95

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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.