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Finding the Fourth Proportional to 69,990.53, 96,586.90 and 39,775.91

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Solution

The fourth proportional to 69,990.53, 96,586.90 and 39,775.91 is: 54,890.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,990.53 : 96,586.90 = 39,775.91 : x
  2. Step 2: Convert to fraction form
    69,990.53/96,586.90 = 39,775.91/x
  3. Step 3: Cross multiply
    69,990.53x = 96,586.90 × 39,775.91
  4. Step 4: Simplify right side
    69,990.53x = 3,841,831,259.20
  5. Step 5: Solve for x
    x = 3,841,831,259.20/69,990.53
  6. Step 6: Final answer
    x = 54,890.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.