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Finding the Fourth Proportional to 208,508.99, 287,739.29 and 117,861.77

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Solution

The fourth proportional to 208,508.99, 287,739.29 and 117,861.77 is: 162,647.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,508.99 : 287,739.29 = 117,861.77 : x
  2. Step 2: Convert to fraction form
    208,508.99/287,739.29 = 117,861.77/x
  3. Step 3: Cross multiply
    208,508.99x = 287,739.29 × 117,861.77
  4. Step 4: Simplify right side
    208,508.99x = 33,913,463,031.95
  5. Step 5: Solve for x
    x = 33,913,463,031.95/208,508.99
  6. Step 6: Final answer
    x = 162,647.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.