Home / 100,783.79-139,087.37-57,770.43

Finding the Fourth Proportional to 100,783.79, 139,087.37 and 57,770.43

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Solution

The fourth proportional to 100,783.79, 139,087.37 and 57,770.43 is: 79,726.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,783.79 : 139,087.37 = 57,770.43 : x
  2. Step 2: Convert to fraction form
    100,783.79/139,087.37 = 57,770.43/x
  3. Step 3: Cross multiply
    100,783.79x = 139,087.37 × 57,770.43
  4. Step 4: Simplify right side
    100,783.79x = 8,035,136,883.62
  5. Step 5: Solve for x
    x = 8,035,136,883.62/100,783.79
  6. Step 6: Final answer
    x = 79,726.48

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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.