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Finding the Fourth Proportional to 77,958.20, 107,599.01 and 49,259.64

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Solution

The fourth proportional to 77,958.20, 107,599.01 and 49,259.64 is: 67,988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,958.20 : 107,599.01 = 49,259.64 : x
  2. Step 2: Convert to fraction form
    77,958.20/107,599.01 = 49,259.64/x
  3. Step 3: Cross multiply
    77,958.20x = 107,599.01 × 49,259.64
  4. Step 4: Simplify right side
    77,958.20x = 5,300,288,048.91
  5. Step 5: Solve for x
    x = 5,300,288,048.91/77,958.20
  6. Step 6: Final answer
    x = 67,988.85

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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.