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Finding the Fourth Proportional to 208,219.44, 312,368.28 and 66,058.80

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Solution

The fourth proportional to 208,219.44, 312,368.28 and 66,058.80 is: 99,100.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,219.44 : 312,368.28 = 66,058.80 : x
  2. Step 2: Convert to fraction form
    208,219.44/312,368.28 = 66,058.80/x
  3. Step 3: Cross multiply
    208,219.44x = 312,368.28 × 66,058.80
  4. Step 4: Simplify right side
    208,219.44x = 20,634,673,734.86
  5. Step 5: Solve for x
    x = 20,634,673,734.86/208,219.44
  6. Step 6: Final answer
    x = 99,100.61

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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.