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Finding the Fourth Proportional to 77,980.95, 107,614.80 and 43,991.01

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Solution

The fourth proportional to 77,980.95, 107,614.80 and 43,991.01 is: 60,708.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,980.95 : 107,614.80 = 43,991.01 : x
  2. Step 2: Convert to fraction form
    77,980.95/107,614.80 = 43,991.01/x
  3. Step 3: Cross multiply
    77,980.95x = 107,614.80 × 43,991.01
  4. Step 4: Simplify right side
    77,980.95x = 4,734,083,742.95
  5. Step 5: Solve for x
    x = 4,734,083,742.95/77,980.95
  6. Step 6: Final answer
    x = 60,708.21

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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.