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Finding the Fourth Proportional to 255,698.40, 383,547.60 and 68,728.80

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Solution

The fourth proportional to 255,698.40, 383,547.60 and 68,728.80 is: 103,093.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,698.40 : 383,547.60 = 68,728.80 : x
  2. Step 2: Convert to fraction form
    255,698.40/383,547.60 = 68,728.80/x
  3. Step 3: Cross multiply
    255,698.40x = 383,547.60 × 68,728.80
  4. Step 4: Simplify right side
    255,698.40x = 26,360,766,290.88
  5. Step 5: Solve for x
    x = 26,360,766,290.88/255,698.40
  6. Step 6: Final answer
    x = 103,093.20

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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.