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Finding the Fourth Proportional to 210,832.40, 316,270.68 and 68,688.74

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Solution

The fourth proportional to 210,832.40, 316,270.68 and 68,688.74 is: 103,040.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,832.40 : 316,270.68 = 68,688.74 : x
  2. Step 2: Convert to fraction form
    210,832.40/316,270.68 = 68,688.74/x
  3. Step 3: Cross multiply
    210,832.40x = 316,270.68 × 68,688.74
  4. Step 4: Simplify right side
    210,832.40x = 21,724,234,508.14
  5. Step 5: Solve for x
    x = 21,724,234,508.14/210,832.40
  6. Step 6: Final answer
    x = 103,040.30

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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.