Home / 213,636.40-320,486.48-78,690.19

Finding the Fourth Proportional to 213,636.40, 320,486.48 and 78,690.19

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Solution

The fourth proportional to 213,636.40, 320,486.48 and 78,690.19 is: 118,047.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,636.40 : 320,486.48 = 78,690.19 : x
  2. Step 2: Convert to fraction form
    213,636.40/320,486.48 = 78,690.19/x
  3. Step 3: Cross multiply
    213,636.40x = 320,486.48 × 78,690.19
  4. Step 4: Simplify right side
    213,636.40x = 25,219,142,003.63
  5. Step 5: Solve for x
    x = 25,219,142,003.63/213,636.40
  6. Step 6: Final answer
    x = 118,047.03

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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.