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Finding the Fourth Proportional to 255,339.70, 383,055.18 and 86,851.42

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Solution

The fourth proportional to 255,339.70, 383,055.18 and 86,851.42 is: 130,292.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,339.70 : 383,055.18 = 86,851.42 : x
  2. Step 2: Convert to fraction form
    255,339.70/383,055.18 = 86,851.42/x
  3. Step 3: Cross multiply
    255,339.70x = 383,055.18 × 86,851.42
  4. Step 4: Simplify right side
    255,339.70x = 33,268,886,321.36
  5. Step 5: Solve for x
    x = 33,268,886,321.36/255,339.70
  6. Step 6: Final answer
    x = 130,292.65

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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.