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Finding the Fourth Proportional to 208,612.41, 312,814.96 and 66,439.14

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Solution

The fourth proportional to 208,612.41, 312,814.96 and 66,439.14 is: 99,625.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,612.41 : 312,814.96 = 66,439.14 : x
  2. Step 2: Convert to fraction form
    208,612.41/312,814.96 = 66,439.14/x
  3. Step 3: Cross multiply
    208,612.41x = 312,814.96 × 66,439.14
  4. Step 4: Simplify right side
    208,612.41x = 20,783,155,956.10
  5. Step 5: Solve for x
    x = 20,783,155,956.10/208,612.41
  6. Step 6: Final answer
    x = 99,625.69

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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.