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Finding the Fourth Proportional to 137,958.53, 190,451.66 and 90,284.69

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Solution

The fourth proportional to 137,958.53, 190,451.66 and 90,284.69 is: 124,637.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,958.53 : 190,451.66 = 90,284.69 : x
  2. Step 2: Convert to fraction form
    137,958.53/190,451.66 = 90,284.69/x
  3. Step 3: Cross multiply
    137,958.53x = 190,451.66 × 90,284.69
  4. Step 4: Simplify right side
    137,958.53x = 17,194,869,107.79
  5. Step 5: Solve for x
    x = 17,194,869,107.79/137,958.53
  6. Step 6: Final answer
    x = 124,637.96

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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.