Home / 77,640.39-107,143.10-43,649.03

Finding the Fourth Proportional to 77,640.39, 107,143.10 and 43,649.03

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Solution

The fourth proportional to 77,640.39, 107,143.10 and 43,649.03 is: 60,235.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,640.39 : 107,143.10 = 43,649.03 : x
  2. Step 2: Convert to fraction form
    77,640.39/107,143.10 = 43,649.03/x
  3. Step 3: Cross multiply
    77,640.39x = 107,143.10 × 43,649.03
  4. Step 4: Simplify right side
    77,640.39x = 4,676,692,599.49
  5. Step 5: Solve for x
    x = 4,676,692,599.49/77,640.39
  6. Step 6: Final answer
    x = 60,235.30

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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.