Home / 77,021.73-115,532.78-20,862.18

Finding the Fourth Proportional to 77,021.73, 115,532.78 and 20,862.18

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Solution

The fourth proportional to 77,021.73, 115,532.78 and 20,862.18 is: 31,293.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,021.73 : 115,532.78 = 20,862.18 : x
  2. Step 2: Convert to fraction form
    77,021.73/115,532.78 = 20,862.18/x
  3. Step 3: Cross multiply
    77,021.73x = 115,532.78 × 20,862.18
  4. Step 4: Simplify right side
    77,021.73x = 2,410,265,547.95
  5. Step 5: Solve for x
    x = 2,410,265,547.95/77,021.73
  6. Step 6: Final answer
    x = 31,293.32

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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.