Home / 135,982.40-187,651.80-77,840.60

Finding the Fourth Proportional to 135,982.40, 187,651.80 and 77,840.60

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Solution

The fourth proportional to 135,982.40, 187,651.80 and 77,840.60 is: 107,417.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,982.40 : 187,651.80 = 77,840.60 : x
  2. Step 2: Convert to fraction form
    135,982.40/187,651.80 = 77,840.60/x
  3. Step 3: Cross multiply
    135,982.40x = 187,651.80 × 77,840.60
  4. Step 4: Simplify right side
    135,982.40x = 14,606,928,703.08
  5. Step 5: Solve for x
    x = 14,606,928,703.08/135,982.40
  6. Step 6: Final answer
    x = 107,417.79

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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.