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Finding the Fourth Proportional to 77,990.62, 107,626.74 and 43,999.10

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Solution

The fourth proportional to 77,990.62, 107,626.74 and 43,999.10 is: 60,718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,990.62 : 107,626.74 = 43,999.10 : x
  2. Step 2: Convert to fraction form
    77,990.62/107,626.74 = 43,999.10/x
  3. Step 3: Cross multiply
    77,990.62x = 107,626.74 × 43,999.10
  4. Step 4: Simplify right side
    77,990.62x = 4,735,479,695.93
  5. Step 5: Solve for x
    x = 4,735,479,695.93/77,990.62
  6. Step 6: Final answer
    x = 60,718.58

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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.