Home / 78,979.32-118,466.28-19,815.48

Finding the Fourth Proportional to 78,979.32, 118,466.28 and 19,815.48

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Solution

The fourth proportional to 78,979.32, 118,466.28 and 19,815.48 is: 29,722.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,979.32 : 118,466.28 = 19,815.48 : x
  2. Step 2: Convert to fraction form
    78,979.32/118,466.28 = 19,815.48/x
  3. Step 3: Cross multiply
    78,979.32x = 118,466.28 × 19,815.48
  4. Step 4: Simplify right side
    78,979.32x = 2,347,466,202.01
  5. Step 5: Solve for x
    x = 2,347,466,202.01/78,979.32
  6. Step 6: Final answer
    x = 29,722.54

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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.