Home / 77,979.87-116,968.79-18,815.04

Finding the Fourth Proportional to 77,979.87, 116,968.79 and 18,815.04

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Solution

The fourth proportional to 77,979.87, 116,968.79 and 18,815.04 is: 28,222.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,979.87 : 116,968.79 = 18,815.04 : x
  2. Step 2: Convert to fraction form
    77,979.87/116,968.79 = 18,815.04/x
  3. Step 3: Cross multiply
    77,979.87x = 116,968.79 × 18,815.04
  4. Step 4: Simplify right side
    77,979.87x = 2,200,772,509.64
  5. Step 5: Solve for x
    x = 2,200,772,509.64/77,979.87
  6. Step 6: Final answer
    x = 28,222.32

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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.