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Finding the Fourth Proportional to 70,399.77, 105,661.16 and 40,776.85

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Solution

The fourth proportional to 70,399.77, 105,661.16 and 40,776.85 is: 61,200.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,399.77 : 105,661.16 = 40,776.85 : x
  2. Step 2: Convert to fraction form
    70,399.77/105,661.16 = 40,776.85/x
  3. Step 3: Cross multiply
    70,399.77x = 105,661.16 × 40,776.85
  4. Step 4: Simplify right side
    70,399.77x = 4,308,529,353.25
  5. Step 5: Solve for x
    x = 4,308,529,353.25/70,399.77
  6. Step 6: Final answer
    x = 61,200.90

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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.