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Finding the Fourth Proportional to 210,808.99, 316,235.64 and 68,665.35

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Solution

The fourth proportional to 210,808.99, 316,235.64 and 68,665.35 is: 103,005.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,808.99 : 316,235.64 = 68,665.35 : x
  2. Step 2: Convert to fraction form
    210,808.99/316,235.64 = 68,665.35/x
  3. Step 3: Cross multiply
    210,808.99x = 316,235.64 × 68,665.35
  4. Step 4: Simplify right side
    210,808.99x = 21,714,429,098.85
  5. Step 5: Solve for x
    x = 21,714,429,098.85/210,808.99
  6. Step 6: Final answer
    x = 103,005.23

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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.