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Finding the Fourth Proportional to 77,659.71, 107,117.70 and 50,387.06

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Solution

The fourth proportional to 77,659.71, 107,117.70 and 50,387.06 is: 69,499.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,659.71 : 107,117.70 = 50,387.06 : x
  2. Step 2: Convert to fraction form
    77,659.71/107,117.70 = 50,387.06/x
  3. Step 3: Cross multiply
    77,659.71x = 107,117.70 × 50,387.06
  4. Step 4: Simplify right side
    77,659.71x = 5,397,345,976.96
  5. Step 5: Solve for x
    x = 5,397,345,976.96/77,659.71
  6. Step 6: Final answer
    x = 69,499.95

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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.