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Finding the Fourth Proportional to 103,727, 143,134.75 and 58,390.49

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Solution

The fourth proportional to 103,727, 143,134.75 and 58,390.49 is: 80,574.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,727 : 143,134.75 = 58,390.49 : x
  2. Step 2: Convert to fraction form
    103,727/143,134.75 = 58,390.49/x
  3. Step 3: Cross multiply
    103,727x = 143,134.75 × 58,390.49
  4. Step 4: Simplify right side
    103,727x = 8,357,708,188.53
  5. Step 5: Solve for x
    x = 8,357,708,188.53/103,727
  6. Step 6: Final answer
    x = 80,574.09

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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.