Home / 100,824-139,137.12-56,122.56

Finding the Fourth Proportional to 100,824, 139,137.12 and 56,122.56

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Solution

The fourth proportional to 100,824, 139,137.12 and 56,122.56 is: 77,449.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,824 : 139,137.12 = 56,122.56 : x
  2. Step 2: Convert to fraction form
    100,824/139,137.12 = 56,122.56/x
  3. Step 3: Cross multiply
    100,824x = 139,137.12 × 56,122.56
  4. Step 4: Simplify right side
    100,824x = 7,808,731,365.43
  5. Step 5: Solve for x
    x = 7,808,731,365.43/100,824
  6. Step 6: Final answer
    x = 77,449.13

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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.