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Finding the Fourth Proportional to 77,879.51, 107,401.95 and 51,992.49

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Solution

The fourth proportional to 77,879.51, 107,401.95 and 51,992.49 is: 71,701.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,879.51 : 107,401.95 = 51,992.49 : x
  2. Step 2: Convert to fraction form
    77,879.51/107,401.95 = 51,992.49/x
  3. Step 3: Cross multiply
    77,879.51x = 107,401.95 × 51,992.49
  4. Step 4: Simplify right side
    77,879.51x = 5,584,094,811.36
  5. Step 5: Solve for x
    x = 5,584,094,811.36/77,879.51
  6. Step 6: Final answer
    x = 71,701.72

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1.5x scale

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.