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Finding the Fourth Proportional to 70,912.89, 97,864.30 and 39,084.75

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Solution

The fourth proportional to 70,912.89, 97,864.30 and 39,084.75 is: 53,939.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,912.89 : 97,864.30 = 39,084.75 : x
  2. Step 2: Convert to fraction form
    70,912.89/97,864.30 = 39,084.75/x
  3. Step 3: Cross multiply
    70,912.89x = 97,864.30 × 39,084.75
  4. Step 4: Simplify right side
    70,912.89x = 3,825,001,699.43
  5. Step 5: Solve for x
    x = 3,825,001,699.43/70,912.89
  6. Step 6: Final answer
    x = 53,939.44

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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.