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Finding the Fourth Proportional to 70,185.96, 96,858.78 and 39,970.44

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Solution

The fourth proportional to 70,185.96, 96,858.78 and 39,970.44 is: 55,160.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,185.96 : 96,858.78 = 39,970.44 : x
  2. Step 2: Convert to fraction form
    70,185.96/96,858.78 = 39,970.44/x
  3. Step 3: Cross multiply
    70,185.96x = 96,858.78 × 39,970.44
  4. Step 4: Simplify right side
    70,185.96x = 3,871,488,054.46
  5. Step 5: Solve for x
    x = 3,871,488,054.46/70,185.96
  6. Step 6: Final answer
    x = 55,160.43

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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.