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Finding the Fourth Proportional to 70,950.45, 97,912.28 and 39,120.48

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Solution

The fourth proportional to 70,950.45, 97,912.28 and 39,120.48 is: 53,986.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,950.45 : 97,912.28 = 39,120.48 : x
  2. Step 2: Convert to fraction form
    70,950.45/97,912.28 = 39,120.48/x
  3. Step 3: Cross multiply
    70,950.45x = 97,912.28 × 39,120.48
  4. Step 4: Simplify right side
    70,950.45x = 3,830,375,391.49
  5. Step 5: Solve for x
    x = 3,830,375,391.49/70,950.45
  6. Step 6: Final answer
    x = 53,986.63

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1.5x scale

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.