Home / 135,639.36-187,204.32-129,659.04

Finding the Fourth Proportional to 135,639.36, 187,204.32 and 129,659.04

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Solution

The fourth proportional to 135,639.36, 187,204.32 and 129,659.04 is: 178,950.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,639.36 : 187,204.32 = 129,659.04 : x
  2. Step 2: Convert to fraction form
    135,639.36/187,204.32 = 129,659.04/x
  3. Step 3: Cross multiply
    135,639.36x = 187,204.32 × 129,659.04
  4. Step 4: Simplify right side
    135,639.36x = 24,272,732,415.05
  5. Step 5: Solve for x
    x = 24,272,732,415.05/135,639.36
  6. Step 6: Final answer
    x = 178,950.51

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1.5x scale

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.