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Finding the Fourth Proportional to 255,749.40, 383,624.10 and 68,779.80

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Solution

The fourth proportional to 255,749.40, 383,624.10 and 68,779.80 is: 103,169.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,749.40 : 383,624.10 = 68,779.80 : x
  2. Step 2: Convert to fraction form
    255,749.40/383,624.10 = 68,779.80/x
  3. Step 3: Cross multiply
    255,749.40x = 383,624.10 × 68,779.80
  4. Step 4: Simplify right side
    255,749.40x = 26,385,588,873.18
  5. Step 5: Solve for x
    x = 26,385,588,873.18/255,749.40
  6. Step 6: Final answer
    x = 103,169.70

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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.