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Finding the Fourth Proportional to 68,319.78, 102,484.53 and 21,572.25

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Solution

The fourth proportional to 68,319.78, 102,484.53 and 21,572.25 is: 32,359.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,319.78 : 102,484.53 = 21,572.25 : x
  2. Step 2: Convert to fraction form
    68,319.78/102,484.53 = 21,572.25/x
  3. Step 3: Cross multiply
    68,319.78x = 102,484.53 × 21,572.25
  4. Step 4: Simplify right side
    68,319.78x = 2,210,821,902.29
  5. Step 5: Solve for x
    x = 2,210,821,902.29/68,319.78
  6. Step 6: Final answer
    x = 32,359.91

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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.