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Finding the Fourth Proportional to 100,796.79, 139,099.54 and 58,354.41

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Solution

The fourth proportional to 100,796.79, 139,099.54 and 58,354.41 is: 80,529.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,796.79 : 139,099.54 = 58,354.41 : x
  2. Step 2: Convert to fraction form
    100,796.79/139,099.54 = 58,354.41/x
  3. Step 3: Cross multiply
    100,796.79x = 139,099.54 × 58,354.41
  4. Step 4: Simplify right side
    100,796.79x = 8,117,071,587.97
  5. Step 5: Solve for x
    x = 8,117,071,587.97/100,796.79
  6. Step 6: Final answer
    x = 80,529.07

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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.