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Finding the Fourth Proportional to 91,852.80, 137,779.20 and 68,233.20

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Solution

The fourth proportional to 91,852.80, 137,779.20 and 68,233.20 is: 102,349.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,852.80 : 137,779.20 = 68,233.20 : x
  2. Step 2: Convert to fraction form
    91,852.80/137,779.20 = 68,233.20/x
  3. Step 3: Cross multiply
    91,852.80x = 137,779.20 × 68,233.20
  4. Step 4: Simplify right side
    91,852.80x = 9,401,115,709.44
  5. Step 5: Solve for x
    x = 9,401,115,709.44/91,852.80
  6. Step 6: Final answer
    x = 102,349.80

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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.