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Finding the Fourth Proportional to 68,663.20, 103,071.60 and 64,151.20

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Solution

The fourth proportional to 68,663.20, 103,071.60 and 64,151.20 is: 96,298.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,663.20 : 103,071.60 = 64,151.20 : x
  2. Step 2: Convert to fraction form
    68,663.20/103,071.60 = 64,151.20/x
  3. Step 3: Cross multiply
    68,663.20x = 103,071.60 × 64,151.20
  4. Step 4: Simplify right side
    68,663.20x = 6,612,166,825.92
  5. Step 5: Solve for x
    x = 6,612,166,825.92/68,663.20
  6. Step 6: Final answer
    x = 96,298.55

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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.