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Finding the Fourth Proportional to 100,552.84, 138,783.18 and 58,105.60

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Solution

The fourth proportional to 100,552.84, 138,783.18 and 58,105.60 is: 80,197.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,552.84 : 138,783.18 = 58,105.60 : x
  2. Step 2: Convert to fraction form
    100,552.84/138,783.18 = 58,105.60/x
  3. Step 3: Cross multiply
    100,552.84x = 138,783.18 × 58,105.60
  4. Step 4: Simplify right side
    100,552.84x = 8,064,079,943.81
  5. Step 5: Solve for x
    x = 8,064,079,943.81/100,552.84
  6. Step 6: Final answer
    x = 80,197.44

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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.