Home / 305,669.52-458,356.82-128,128.86

Finding the Fourth Proportional to 305,669.52, 458,356.82 and 128,128.86

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Solution

The fourth proportional to 305,669.52, 458,356.82 and 128,128.86 is: 192,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,669.52 : 458,356.82 = 128,128.86 : x
  2. Step 2: Convert to fraction form
    305,669.52/458,356.82 = 128,128.86/x
  3. Step 3: Cross multiply
    305,669.52x = 458,356.82 × 128,128.86
  4. Step 4: Simplify right side
    305,669.52x = 58,728,736,179.18
  5. Step 5: Solve for x
    x = 58,728,736,179.18/305,669.52
  6. Step 6: Final answer
    x = 192,131.48

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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.