Home / 272,740.20-409,209-139,683.12

Finding the Fourth Proportional to 272,740.20, 409,209 and 139,683.12

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Solution

The fourth proportional to 272,740.20, 409,209 and 139,683.12 is: 209,575.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,740.20 : 409,209 = 139,683.12 : x
  2. Step 2: Convert to fraction form
    272,740.20/409,209 = 139,683.12/x
  3. Step 3: Cross multiply
    272,740.20x = 409,209 × 139,683.12
  4. Step 4: Simplify right side
    272,740.20x = 57,159,589,852.08
  5. Step 5: Solve for x
    x = 57,159,589,852.08/272,740.20
  6. Step 6: Final answer
    x = 209,575.23

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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.