Home / 138,582.35-191,243.59-74,920.13

Finding the Fourth Proportional to 138,582.35, 191,243.59 and 74,920.13

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Solution

The fourth proportional to 138,582.35, 191,243.59 and 74,920.13 is: 103,389.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,582.35 : 191,243.59 = 74,920.13 : x
  2. Step 2: Convert to fraction form
    138,582.35/191,243.59 = 74,920.13/x
  3. Step 3: Cross multiply
    138,582.35x = 191,243.59 × 74,920.13
  4. Step 4: Simplify right side
    138,582.35x = 14,327,993,480.95
  5. Step 5: Solve for x
    x = 14,327,993,480.95/138,582.35
  6. Step 6: Final answer
    x = 103,389.75

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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.