Home / 77,981.58-107,615.43-42,172.29

Finding the Fourth Proportional to 77,981.58, 107,615.43 and 42,172.29

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Solution

The fourth proportional to 77,981.58, 107,615.43 and 42,172.29 is: 58,198.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,981.58 : 107,615.43 = 42,172.29 : x
  2. Step 2: Convert to fraction form
    77,981.58/107,615.43 = 42,172.29/x
  3. Step 3: Cross multiply
    77,981.58x = 107,615.43 × 42,172.29
  4. Step 4: Simplify right side
    77,981.58x = 4,538,389,122.43
  5. Step 5: Solve for x
    x = 4,538,389,122.43/77,981.58
  6. Step 6: Final answer
    x = 58,198.22

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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.