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Finding the Fourth Proportional to 100,892.44, 139,230.30 and 55,569.52

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Solution

The fourth proportional to 100,892.44, 139,230.30 and 55,569.52 is: 76,685.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,892.44 : 139,230.30 = 55,569.52 : x
  2. Step 2: Convert to fraction form
    100,892.44/139,230.30 = 55,569.52/x
  3. Step 3: Cross multiply
    100,892.44x = 139,230.30 × 55,569.52
  4. Step 4: Simplify right side
    100,892.44x = 7,736,960,940.46
  5. Step 5: Solve for x
    x = 7,736,960,940.46/100,892.44
  6. Step 6: Final answer
    x = 76,685.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.