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Finding the Fourth Proportional to 70,728.88, 97,608.36 and 38,900.24

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Solution

The fourth proportional to 70,728.88, 97,608.36 and 38,900.24 is: 53,683.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,728.88 : 97,608.36 = 38,900.24 : x
  2. Step 2: Convert to fraction form
    70,728.88/97,608.36 = 38,900.24/x
  3. Step 3: Cross multiply
    70,728.88x = 97,608.36 × 38,900.24
  4. Step 4: Simplify right side
    70,728.88x = 3,796,988,630.01
  5. Step 5: Solve for x
    x = 3,796,988,630.01/70,728.88
  6. Step 6: Final answer
    x = 53,683.71

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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.