Home / 138,441.07-191,048.68-74,778.86

Finding the Fourth Proportional to 138,441.07, 191,048.68 and 74,778.86

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Solution

The fourth proportional to 138,441.07, 191,048.68 and 74,778.86 is: 103,194.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,441.07 : 191,048.68 = 74,778.86 : x
  2. Step 2: Convert to fraction form
    138,441.07/191,048.68 = 74,778.86/x
  3. Step 3: Cross multiply
    138,441.07x = 191,048.68 × 74,778.86
  4. Step 4: Simplify right side
    138,441.07x = 14,286,403,117.86
  5. Step 5: Solve for x
    x = 14,286,403,117.86/138,441.07
  6. Step 6: Final answer
    x = 103,194.84

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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.