Home / 77,985.45-107,619.57-42,175.49

Finding the Fourth Proportional to 77,985.45, 107,619.57 and 42,175.49

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Solution

The fourth proportional to 77,985.45, 107,619.57 and 42,175.49 is: 58,201.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,985.45 : 107,619.57 = 42,175.49 : x
  2. Step 2: Convert to fraction form
    77,985.45/107,619.57 = 42,175.49/x
  3. Step 3: Cross multiply
    77,985.45x = 107,619.57 × 42,175.49
  4. Step 4: Simplify right side
    77,985.45x = 4,538,907,560.24
  5. Step 5: Solve for x
    x = 4,538,907,560.24/77,985.45
  6. Step 6: Final answer
    x = 58,201.98

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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.