Home / 78,131.65-117,196.62-18,967.32

Finding the Fourth Proportional to 78,131.65, 117,196.62 and 18,967.32

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Solution

The fourth proportional to 78,131.65, 117,196.62 and 18,967.32 is: 28,450.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,131.65 : 117,196.62 = 18,967.32 : x
  2. Step 2: Convert to fraction form
    78,131.65/117,196.62 = 18,967.32/x
  3. Step 3: Cross multiply
    78,131.65x = 117,196.62 × 18,967.32
  4. Step 4: Simplify right side
    78,131.65x = 2,222,905,794.46
  5. Step 5: Solve for x
    x = 2,222,905,794.46/78,131.65
  6. Step 6: Final answer
    x = 28,450.77

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1.5x scale

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.