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Finding the Fourth Proportional to 70,055.94, 105,062.35 and 20,122.62

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Solution

The fourth proportional to 70,055.94, 105,062.35 and 20,122.62 is: 30,177.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,055.94 : 105,062.35 = 20,122.62 : x
  2. Step 2: Convert to fraction form
    70,055.94/105,062.35 = 20,122.62/x
  3. Step 3: Cross multiply
    70,055.94x = 105,062.35 × 20,122.62
  4. Step 4: Simplify right side
    70,055.94x = 2,114,129,745.36
  5. Step 5: Solve for x
    x = 2,114,129,745.36/70,055.94
  6. Step 6: Final answer
    x = 30,177.74

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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.