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Finding the Fourth Proportional to 100,569.48, 138,770.47 and 58,119.82

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Solution

The fourth proportional to 100,569.48, 138,770.47 and 58,119.82 is: 80,196.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,569.48 : 138,770.47 = 58,119.82 : x
  2. Step 2: Convert to fraction form
    100,569.48/138,770.47 = 58,119.82/x
  3. Step 3: Cross multiply
    100,569.48x = 138,770.47 × 58,119.82
  4. Step 4: Simplify right side
    100,569.48x = 8,065,314,737.72
  5. Step 5: Solve for x
    x = 8,065,314,737.72/100,569.48
  6. Step 6: Final answer
    x = 80,196.44

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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.