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Finding the Fourth Proportional to 70,528.29, 105,799.25 and 20,607.25

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Solution

The fourth proportional to 70,528.29, 105,799.25 and 20,607.25 is: 30,912.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,528.29 : 105,799.25 = 20,607.25 : x
  2. Step 2: Convert to fraction form
    70,528.29/105,799.25 = 20,607.25/x
  3. Step 3: Cross multiply
    70,528.29x = 105,799.25 × 20,607.25
  4. Step 4: Simplify right side
    70,528.29x = 2,180,231,381.58
  5. Step 5: Solve for x
    x = 2,180,231,381.58/70,528.29
  6. Step 6: Final answer
    x = 30,912.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.