Home / 213,746.08-320,548.84-78,779

Finding the Fourth Proportional to 213,746.08, 320,548.84 and 78,779

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Solution

The fourth proportional to 213,746.08, 320,548.84 and 78,779 is: 118,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,746.08 : 320,548.84 = 78,779 : x
  2. Step 2: Convert to fraction form
    213,746.08/320,548.84 = 78,779/x
  3. Step 3: Cross multiply
    213,746.08x = 320,548.84 × 78,779
  4. Step 4: Simplify right side
    213,746.08x = 25,252,517,066.36
  5. Step 5: Solve for x
    x = 25,252,517,066.36/213,746.08
  6. Step 6: Final answer
    x = 118,142.60

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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.