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Finding the Fourth Proportional to 100,990.58, 139,358.79 and 58,551.84

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Solution

The fourth proportional to 100,990.58, 139,358.79 and 58,551.84 is: 80,796.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,990.58 : 139,358.79 = 58,551.84 : x
  2. Step 2: Convert to fraction form
    100,990.58/139,358.79 = 58,551.84/x
  3. Step 3: Cross multiply
    100,990.58x = 139,358.79 × 58,551.84
  4. Step 4: Simplify right side
    100,990.58x = 8,159,713,574.67
  5. Step 5: Solve for x
    x = 8,159,713,574.67/100,990.58
  6. Step 6: Final answer
    x = 80,796.78

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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.