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Finding the Fourth Proportional to 220,072.66, 303,886.44 and 139,642.90

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Solution

The fourth proportional to 220,072.66, 303,886.44 and 139,642.90 is: 192,825.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,072.66 : 303,886.44 = 139,642.90 : x
  2. Step 2: Convert to fraction form
    220,072.66/303,886.44 = 139,642.90/x
  3. Step 3: Cross multiply
    220,072.66x = 303,886.44 × 139,642.90
  4. Step 4: Simplify right side
    220,072.66x = 42,435,583,752.28
  5. Step 5: Solve for x
    x = 42,435,583,752.28/220,072.66
  6. Step 6: Final answer
    x = 192,825.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.