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Finding the Fourth Proportional to 255,700.80, 383,550.66 and 68,712.30

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Solution

The fourth proportional to 255,700.80, 383,550.66 and 68,712.30 is: 103,068.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,700.80 : 383,550.66 = 68,712.30 : x
  2. Step 2: Convert to fraction form
    255,700.80/383,550.66 = 68,712.30/x
  3. Step 3: Cross multiply
    255,700.80x = 383,550.66 × 68,712.30
  4. Step 4: Simplify right side
    255,700.80x = 26,354,648,015.12
  5. Step 5: Solve for x
    x = 26,354,648,015.12/255,700.80
  6. Step 6: Final answer
    x = 103,068.30

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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.