Home / 149,078.07-205,733.52-85,428.47

Finding the Fourth Proportional to 149,078.07, 205,733.52 and 85,428.47

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Solution

The fourth proportional to 149,078.07, 205,733.52 and 85,428.47 is: 117,894.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,078.07 : 205,733.52 = 85,428.47 : x
  2. Step 2: Convert to fraction form
    149,078.07/205,733.52 = 85,428.47/x
  3. Step 3: Cross multiply
    149,078.07x = 205,733.52 × 85,428.47
  4. Step 4: Simplify right side
    149,078.07x = 17,575,500,355.65
  5. Step 5: Solve for x
    x = 17,575,500,355.65/149,078.07
  6. Step 6: Final answer
    x = 117,894.61

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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.