Home / 128,976.14-193,289.22-72,788.46

Finding the Fourth Proportional to 128,976.14, 193,289.22 and 72,788.46

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Solution

The fourth proportional to 128,976.14, 193,289.22 and 72,788.46 is: 109,083.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,976.14 : 193,289.22 = 72,788.46 : x
  2. Step 2: Convert to fraction form
    128,976.14/193,289.22 = 72,788.46/x
  3. Step 3: Cross multiply
    128,976.14x = 193,289.22 × 72,788.46
  4. Step 4: Simplify right side
    128,976.14x = 14,069,224,658.40
  5. Step 5: Solve for x
    x = 14,069,224,658.40/128,976.14
  6. Step 6: Final answer
    x = 109,083.93

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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.