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Finding the Fourth Proportional to 255,703.80, 383,555.16 and 68,715.30

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Solution

The fourth proportional to 255,703.80, 383,555.16 and 68,715.30 is: 103,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,703.80 : 383,555.16 = 68,715.30 : x
  2. Step 2: Convert to fraction form
    255,703.80/383,555.16 = 68,715.30/x
  3. Step 3: Cross multiply
    255,703.80x = 383,555.16 × 68,715.30
  4. Step 4: Simplify right side
    255,703.80x = 26,356,107,885.95
  5. Step 5: Solve for x
    x = 26,356,107,885.95/255,703.80
  6. Step 6: Final answer
    x = 103,072.80

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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.