Home / 128,973.88-193,285.86-72,786.21

Finding the Fourth Proportional to 128,973.88, 193,285.86 and 72,786.21

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Solution

The fourth proportional to 128,973.88, 193,285.86 and 72,786.21 is: 109,080.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,973.88 : 193,285.86 = 72,786.21 : x
  2. Step 2: Convert to fraction form
    128,973.88/193,285.86 = 72,786.21/x
  3. Step 3: Cross multiply
    128,973.88x = 193,285.86 × 72,786.21
  4. Step 4: Simplify right side
    128,973.88x = 14,068,544,198.22
  5. Step 5: Solve for x
    x = 14,068,544,198.22/128,973.88
  6. Step 6: Final answer
    x = 109,080.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.