Home / 138,279.85-190,811.58-77,849.39

Finding the Fourth Proportional to 138,279.85, 190,811.58 and 77,849.39

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Solution

The fourth proportional to 138,279.85, 190,811.58 and 77,849.39 is: 107,423.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,279.85 : 190,811.58 = 77,849.39 : x
  2. Step 2: Convert to fraction form
    138,279.85/190,811.58 = 77,849.39/x
  3. Step 3: Cross multiply
    138,279.85x = 190,811.58 × 77,849.39
  4. Step 4: Simplify right side
    138,279.85x = 14,854,565,107.94
  5. Step 5: Solve for x
    x = 14,854,565,107.94/138,279.85
  6. Step 6: Final answer
    x = 107,423.93

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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.