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Finding the Fourth Proportional to 203,031.72, 304,579.98 and 69,879.06

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Solution

The fourth proportional to 203,031.72, 304,579.98 and 69,879.06 is: 104,829.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,031.72 : 304,579.98 = 69,879.06 : x
  2. Step 2: Convert to fraction form
    203,031.72/304,579.98 = 69,879.06/x
  3. Step 3: Cross multiply
    203,031.72x = 304,579.98 × 69,879.06
  4. Step 4: Simplify right side
    203,031.72x = 21,283,762,697.22
  5. Step 5: Solve for x
    x = 21,283,762,697.22/203,031.72
  6. Step 6: Final answer
    x = 104,829.74

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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.