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Finding the Fourth Proportional to 210,990.06, 316,495.31 and 68,835.06

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Solution

The fourth proportional to 210,990.06, 316,495.31 and 68,835.06 is: 103,255.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,990.06 : 316,495.31 = 68,835.06 : x
  2. Step 2: Convert to fraction form
    210,990.06/316,495.31 = 68,835.06/x
  3. Step 3: Cross multiply
    210,990.06x = 316,495.31 × 68,835.06
  4. Step 4: Simplify right side
    210,990.06x = 21,785,973,309.39
  5. Step 5: Solve for x
    x = 21,785,973,309.39/210,990.06
  6. Step 6: Final answer
    x = 103,255.92

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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.