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Finding the Fourth Proportional to 255,319.44, 383,215.81 and 129,047.68

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Solution

The fourth proportional to 255,319.44, 383,215.81 and 129,047.68 is: 193,691.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,319.44 : 383,215.81 = 129,047.68 : x
  2. Step 2: Convert to fraction form
    255,319.44/383,215.81 = 129,047.68/x
  3. Step 3: Cross multiply
    255,319.44x = 383,215.81 × 129,047.68
  4. Step 4: Simplify right side
    255,319.44x = 49,453,111,618.19
  5. Step 5: Solve for x
    x = 49,453,111,618.19/255,319.44
  6. Step 6: Final answer
    x = 193,691.13

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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.