Home / 212,420.20-293,139.78-122,996.20

Finding the Fourth Proportional to 212,420.20, 293,139.78 and 122,996.20

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Solution

The fourth proportional to 212,420.20, 293,139.78 and 122,996.20 is: 169,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,420.20 : 293,139.78 = 122,996.20 : x
  2. Step 2: Convert to fraction form
    212,420.20/293,139.78 = 122,996.20/x
  3. Step 3: Cross multiply
    212,420.20x = 293,139.78 × 122,996.20
  4. Step 4: Simplify right side
    212,420.20x = 36,055,079,008.84
  5. Step 5: Solve for x
    x = 36,055,079,008.84/212,420.20
  6. Step 6: Final answer
    x = 169,734.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.