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Finding the Fourth Proportional to 208,544.10, 312,816.15 and 129,617.70

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Solution

The fourth proportional to 208,544.10, 312,816.15 and 129,617.70 is: 194,426.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,544.10 : 312,816.15 = 129,617.70 : x
  2. Step 2: Convert to fraction form
    208,544.10/312,816.15 = 129,617.70/x
  3. Step 3: Cross multiply
    208,544.10x = 312,816.15 × 129,617.70
  4. Step 4: Simplify right side
    208,544.10x = 40,546,509,885.86
  5. Step 5: Solve for x
    x = 40,546,509,885.86/208,544.10
  6. Step 6: Final answer
    x = 194,426.55

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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.