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Finding the Fourth Proportional to 255,699.21, 383,548.50 and 68,710.71

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Solution

The fourth proportional to 255,699.21, 383,548.50 and 68,710.71 is: 103,065.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,699.21 : 383,548.50 = 68,710.71 : x
  2. Step 2: Convert to fraction form
    255,699.21/383,548.50 = 68,710.71/x
  3. Step 3: Cross multiply
    255,699.21x = 383,548.50 × 68,710.71
  4. Step 4: Simplify right side
    255,699.21x = 26,353,889,754.44
  5. Step 5: Solve for x
    x = 26,353,889,754.44/255,699.21
  6. Step 6: Final answer
    x = 103,065.98

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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.