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Finding the Fourth Proportional to 70,950.94, 97,912.96 and 39,120.98

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Solution

The fourth proportional to 70,950.94, 97,912.96 and 39,120.98 is: 53,987.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,950.94 : 97,912.96 = 39,120.98 : x
  2. Step 2: Convert to fraction form
    70,950.94/97,912.96 = 39,120.98/x
  3. Step 3: Cross multiply
    70,950.94x = 97,912.96 × 39,120.98
  4. Step 4: Simplify right side
    70,950.94x = 3,830,450,949.90
  5. Step 5: Solve for x
    x = 3,830,450,949.90/70,950.94
  6. Step 6: Final answer
    x = 53,987.32

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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.