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Finding the Fourth Proportional to 70,859.36, 97,781.42 and 39,028.25

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Solution

The fourth proportional to 70,859.36, 97,781.42 and 39,028.25 is: 53,856.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,859.36 : 97,781.42 = 39,028.25 : x
  2. Step 2: Convert to fraction form
    70,859.36/97,781.42 = 39,028.25/x
  3. Step 3: Cross multiply
    70,859.36x = 97,781.42 × 39,028.25
  4. Step 4: Simplify right side
    70,859.36x = 3,816,237,509.97
  5. Step 5: Solve for x
    x = 3,816,237,509.97/70,859.36
  6. Step 6: Final answer
    x = 53,856.51

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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.