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Finding the Fourth Proportional to 210,993.56, 316,518.13 and 68,788.90

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Solution

The fourth proportional to 210,993.56, 316,518.13 and 68,788.90 is: 103,192.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,993.56 : 316,518.13 = 68,788.90 : x
  2. Step 2: Convert to fraction form
    210,993.56/316,518.13 = 68,788.90/x
  3. Step 3: Cross multiply
    210,993.56x = 316,518.13 × 68,788.90
  4. Step 4: Simplify right side
    210,993.56x = 21,772,932,693.98
  5. Step 5: Solve for x
    x = 21,772,932,693.98/210,993.56
  6. Step 6: Final answer
    x = 103,192.40

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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.