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Finding the Fourth Proportional to 77,797.86, 107,363.17 and 47,582.63

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Solution

The fourth proportional to 77,797.86, 107,363.17 and 47,582.63 is: 65,665.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,797.86 : 107,363.17 = 47,582.63 : x
  2. Step 2: Convert to fraction form
    77,797.86/107,363.17 = 47,582.63/x
  3. Step 3: Cross multiply
    77,797.86x = 107,363.17 × 47,582.63
  4. Step 4: Simplify right side
    77,797.86x = 5,108,621,993.74
  5. Step 5: Solve for x
    x = 5,108,621,993.74/77,797.86
  6. Step 6: Final answer
    x = 65,665.33

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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.