Home / 78,292.13-117,437.87-28,360.54

Finding the Fourth Proportional to 78,292.13, 117,437.87 and 28,360.54

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Solution

The fourth proportional to 78,292.13, 117,437.87 and 28,360.54 is: 42,540.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,292.13 : 117,437.87 = 28,360.54 : x
  2. Step 2: Convert to fraction form
    78,292.13/117,437.87 = 28,360.54/x
  3. Step 3: Cross multiply
    78,292.13x = 117,437.87 × 28,360.54
  4. Step 4: Simplify right side
    78,292.13x = 3,330,601,409.65
  5. Step 5: Solve for x
    x = 3,330,601,409.65/78,292.13
  6. Step 6: Final answer
    x = 42,540.69

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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.