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Finding the Fourth Proportional to 70,399.77, 97,158.65 and 40,189.64

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Solution

The fourth proportional to 70,399.77, 97,158.65 and 40,189.64 is: 55,465.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,399.77 : 97,158.65 = 40,189.64 : x
  2. Step 2: Convert to fraction form
    70,399.77/97,158.65 = 40,189.64/x
  3. Step 3: Cross multiply
    70,399.77x = 97,158.65 × 40,189.64
  4. Step 4: Simplify right side
    70,399.77x = 3,904,770,479.64
  5. Step 5: Solve for x
    x = 3,904,770,479.64/70,399.77
  6. Step 6: Final answer
    x = 55,465.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.