Home / 77,005.12-115,511.76-21,605.44

Finding the Fourth Proportional to 77,005.12, 115,511.76 and 21,605.44

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Solution

The fourth proportional to 77,005.12, 115,511.76 and 21,605.44 is: 32,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,005.12 : 115,511.76 = 21,605.44 : x
  2. Step 2: Convert to fraction form
    77,005.12/115,511.76 = 21,605.44/x
  3. Step 3: Cross multiply
    77,005.12x = 115,511.76 × 21,605.44
  4. Step 4: Simplify right side
    77,005.12x = 2,495,682,399.97
  5. Step 5: Solve for x
    x = 2,495,682,399.97/77,005.12
  6. Step 6: Final answer
    x = 32,409.30

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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.