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Finding the Fourth Proportional to 70,021.56, 105,032.28 and 20,773.56

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Solution

The fourth proportional to 70,021.56, 105,032.28 and 20,773.56 is: 31,160.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,021.56 : 105,032.28 = 20,773.56 : x
  2. Step 2: Convert to fraction form
    70,021.56/105,032.28 = 20,773.56/x
  3. Step 3: Cross multiply
    70,021.56x = 105,032.28 × 20,773.56
  4. Step 4: Simplify right side
    70,021.56x = 2,181,894,370.52
  5. Step 5: Solve for x
    x = 2,181,894,370.52/70,021.56
  6. Step 6: Final answer
    x = 31,160.32

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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.