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Finding the Fourth Proportional to 200,085.06, 300,127.58 and 81,756.28

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Solution

The fourth proportional to 200,085.06, 300,127.58 and 81,756.28 is: 122,634.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,085.06 : 300,127.58 = 81,756.28 : x
  2. Step 2: Convert to fraction form
    200,085.06/300,127.58 = 81,756.28/x
  3. Step 3: Cross multiply
    200,085.06x = 300,127.58 × 81,756.28
  4. Step 4: Simplify right side
    200,085.06x = 24,537,314,466.20
  5. Step 5: Solve for x
    x = 24,537,314,466.20/200,085.06
  6. Step 6: Final answer
    x = 122,634.42

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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.