Home / 99,136.78-148,749.18-40,087.78

Finding the Fourth Proportional to 99,136.78, 148,749.18 and 40,087.78

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Solution

The fourth proportional to 99,136.78, 148,749.18 and 40,087.78 is: 60,149.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,136.78 : 148,749.18 = 40,087.78 : x
  2. Step 2: Convert to fraction form
    99,136.78/148,749.18 = 40,087.78/x
  3. Step 3: Cross multiply
    99,136.78x = 148,749.18 × 40,087.78
  4. Step 4: Simplify right side
    99,136.78x = 5,963,024,403.02
  5. Step 5: Solve for x
    x = 5,963,024,403.02/99,136.78
  6. Step 6: Final answer
    x = 60,149.47

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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.