Home / 138,443.39-191,051.94-74,781.18

Finding the Fourth Proportional to 138,443.39, 191,051.94 and 74,781.18

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Solution

The fourth proportional to 138,443.39, 191,051.94 and 74,781.18 is: 103,198.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,443.39 : 191,051.94 = 74,781.18 : x
  2. Step 2: Convert to fraction form
    138,443.39/191,051.94 = 74,781.18/x
  3. Step 3: Cross multiply
    138,443.39x = 191,051.94 × 74,781.18
  4. Step 4: Simplify right side
    138,443.39x = 14,287,089,514.49
  5. Step 5: Solve for x
    x = 14,287,089,514.49/138,443.39
  6. Step 6: Final answer
    x = 103,198.07

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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.