Home / 52,105.81-78,158.75-12,662.65

Finding the Fourth Proportional to 52,105.81, 78,158.75 and 12,662.65

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Solution

The fourth proportional to 52,105.81, 78,158.75 and 12,662.65 is: 18,993.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,105.81 : 78,158.75 = 12,662.65 : x
  2. Step 2: Convert to fraction form
    52,105.81/78,158.75 = 12,662.65/x
  3. Step 3: Cross multiply
    52,105.81x = 78,158.75 × 12,662.65
  4. Step 4: Simplify right side
    52,105.81x = 989,697,185.51
  5. Step 5: Solve for x
    x = 989,697,185.51/52,105.81
  6. Step 6: Final answer
    x = 18,993.99

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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.