Home / 221,012.20-331,518.30-137,031.40

Finding the Fourth Proportional to 221,012.20, 331,518.30 and 137,031.40

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Solution

The fourth proportional to 221,012.20, 331,518.30 and 137,031.40 is: 205,547.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,012.20 : 331,518.30 = 137,031.40 : x
  2. Step 2: Convert to fraction form
    221,012.20/331,518.30 = 137,031.40/x
  3. Step 3: Cross multiply
    221,012.20x = 331,518.30 × 137,031.40
  4. Step 4: Simplify right side
    221,012.20x = 45,428,416,774.62
  5. Step 5: Solve for x
    x = 45,428,416,774.62/221,012.20
  6. Step 6: Final answer
    x = 205,547.10

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1.5x scale

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.