Home / 143,389.59-197,879.91-78,861.64

Finding the Fourth Proportional to 143,389.59, 197,879.91 and 78,861.64

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Solution

The fourth proportional to 143,389.59, 197,879.91 and 78,861.64 is: 108,830.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,389.59 : 197,879.91 = 78,861.64 : x
  2. Step 2: Convert to fraction form
    143,389.59/197,879.91 = 78,861.64/x
  3. Step 3: Cross multiply
    143,389.59x = 197,879.91 × 78,861.64
  4. Step 4: Simplify right side
    143,389.59x = 15,605,134,225.65
  5. Step 5: Solve for x
    x = 15,605,134,225.65/143,389.59
  6. Step 6: Final answer
    x = 108,830.31

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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.