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Finding the Fourth Proportional to 70,346.45, 105,525.14 and 20,427.37

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Solution

The fourth proportional to 70,346.45, 105,525.14 and 20,427.37 is: 30,642.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,346.45 : 105,525.14 = 20,427.37 : x
  2. Step 2: Convert to fraction form
    70,346.45/105,525.14 = 20,427.37/x
  3. Step 3: Cross multiply
    70,346.45x = 105,525.14 × 20,427.37
  4. Step 4: Simplify right side
    70,346.45x = 2,155,601,079.08
  5. Step 5: Solve for x
    x = 2,155,601,079.08/70,346.45
  6. Step 6: Final answer
    x = 30,642.64

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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.