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Finding the Fourth Proportional to 203,018.70, 304,614.45 and 128,196.30

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Solution

The fourth proportional to 203,018.70, 304,614.45 and 128,196.30 is: 192,349.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,018.70 : 304,614.45 = 128,196.30 : x
  2. Step 2: Convert to fraction form
    203,018.70/304,614.45 = 128,196.30/x
  3. Step 3: Cross multiply
    203,018.70x = 304,614.45 × 128,196.30
  4. Step 4: Simplify right side
    203,018.70x = 39,050,445,416.54
  5. Step 5: Solve for x
    x = 39,050,445,416.54/203,018.70
  6. Step 6: Final answer
    x = 192,349.01

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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.