Home / 139,601.20-209,401.80-55,381.45

Finding the Fourth Proportional to 139,601.20, 209,401.80 and 55,381.45

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Solution

The fourth proportional to 139,601.20, 209,401.80 and 55,381.45 is: 83,072.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,601.20 : 209,401.80 = 55,381.45 : x
  2. Step 2: Convert to fraction form
    139,601.20/209,401.80 = 55,381.45/x
  3. Step 3: Cross multiply
    139,601.20x = 209,401.80 × 55,381.45
  4. Step 4: Simplify right side
    139,601.20x = 11,596,975,316.61
  5. Step 5: Solve for x
    x = 11,596,975,316.61/139,601.20
  6. Step 6: Final answer
    x = 83,072.18

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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.