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Finding the Fourth Proportional to 208,000.53, 311,388.44 and 128,860.29

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Solution

The fourth proportional to 208,000.53, 311,388.44 and 128,860.29 is: 192,911.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,000.53 : 311,388.44 = 128,860.29 : x
  2. Step 2: Convert to fraction form
    208,000.53/311,388.44 = 128,860.29/x
  3. Step 3: Cross multiply
    208,000.53x = 311,388.44 × 128,860.29
  4. Step 4: Simplify right side
    208,000.53x = 40,125,604,036.75
  5. Step 5: Solve for x
    x = 40,125,604,036.75/208,000.53
  6. Step 6: Final answer
    x = 192,911.07

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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.