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Finding the Fourth Proportional to 70,940.89, 97,902.84 and 39,109.74

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Solution

The fourth proportional to 70,940.89, 97,902.84 and 39,109.74 is: 53,973.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,940.89 : 97,902.84 = 39,109.74 : x
  2. Step 2: Convert to fraction form
    70,940.89/97,902.84 = 39,109.74/x
  3. Step 3: Cross multiply
    70,940.89x = 97,902.84 × 39,109.74
  4. Step 4: Simplify right side
    70,940.89x = 3,828,954,617.66
  5. Step 5: Solve for x
    x = 3,828,954,617.66/70,940.89
  6. Step 6: Final answer
    x = 53,973.87

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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.