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Finding the Fourth Proportional to 70,531.29, 105,803.75 and 20,610.25

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Solution

The fourth proportional to 70,531.29, 105,803.75 and 20,610.25 is: 30,917.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,531.29 : 105,803.75 = 20,610.25 : x
  2. Step 2: Convert to fraction form
    70,531.29/105,803.75 = 20,610.25/x
  3. Step 3: Cross multiply
    70,531.29x = 105,803.75 × 20,610.25
  4. Step 4: Simplify right side
    70,531.29x = 2,180,641,525.45
  5. Step 5: Solve for x
    x = 2,180,641,525.45/70,531.29
  6. Step 6: Final answer
    x = 30,917.36

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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.