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Finding the Fourth Proportional to 208,454.63, 312,678.63 and 66,297.85

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Solution

The fourth proportional to 208,454.63, 312,678.63 and 66,297.85 is: 99,445.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,454.63 : 312,678.63 = 66,297.85 : x
  2. Step 2: Convert to fraction form
    208,454.63/312,678.63 = 66,297.85/x
  3. Step 3: Cross multiply
    208,454.63x = 312,678.63 × 66,297.85
  4. Step 4: Simplify right side
    208,454.63x = 20,729,920,128.25
  5. Step 5: Solve for x
    x = 20,729,920,128.25/208,454.63
  6. Step 6: Final answer
    x = 99,445.72

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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.