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Finding the Fourth Proportional to 70,125.55, 105,163.72 and 20,192.29

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Solution

The fourth proportional to 70,125.55, 105,163.72 and 20,192.29 is: 30,281.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,125.55 : 105,163.72 = 20,192.29 : x
  2. Step 2: Convert to fraction form
    70,125.55/105,163.72 = 20,192.29/x
  3. Step 3: Cross multiply
    70,125.55x = 105,163.72 × 20,192.29
  4. Step 4: Simplify right side
    70,125.55x = 2,123,496,018.33
  5. Step 5: Solve for x
    x = 2,123,496,018.33/70,125.55
  6. Step 6: Final answer
    x = 30,281.35

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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.