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Finding the Fourth Proportional to 255,709.40, 383,564.10 and 68,739.80

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Solution

The fourth proportional to 255,709.40, 383,564.10 and 68,739.80 is: 103,109.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,709.40 : 383,564.10 = 68,739.80 : x
  2. Step 2: Convert to fraction form
    255,709.40/383,564.10 = 68,739.80/x
  3. Step 3: Cross multiply
    255,709.40x = 383,564.10 × 68,739.80
  4. Step 4: Simplify right side
    255,709.40x = 26,366,119,521.18
  5. Step 5: Solve for x
    x = 26,366,119,521.18/255,709.40
  6. Step 6: Final answer
    x = 103,109.70

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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.