Home / 256,981.20-385,496.10-69,992.70

Finding the Fourth Proportional to 256,981.20, 385,496.10 and 69,992.70

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Solution

The fourth proportional to 256,981.20, 385,496.10 and 69,992.70 is: 104,995.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,981.20 : 385,496.10 = 69,992.70 : x
  2. Step 2: Convert to fraction form
    256,981.20/385,496.10 = 69,992.70/x
  3. Step 3: Cross multiply
    256,981.20x = 385,496.10 × 69,992.70
  4. Step 4: Simplify right side
    256,981.20x = 26,981,912,878.47
  5. Step 5: Solve for x
    x = 26,981,912,878.47/256,981.20
  6. Step 6: Final answer
    x = 104,995.67

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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.