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Finding the Fourth Proportional to 101,118.80, 139,571.70 and 58,691

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Solution

The fourth proportional to 101,118.80, 139,571.70 and 58,691 is: 81,009.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,118.80 : 139,571.70 = 58,691 : x
  2. Step 2: Convert to fraction form
    101,118.80/139,571.70 = 58,691/x
  3. Step 3: Cross multiply
    101,118.80x = 139,571.70 × 58,691
  4. Step 4: Simplify right side
    101,118.80x = 8,191,602,644.70
  5. Step 5: Solve for x
    x = 8,191,602,644.70/101,118.80
  6. Step 6: Final answer
    x = 81,009.69

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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.