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Finding the Fourth Proportional to 208,531.80, 312,797.70 and 96,211.80

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Solution

The fourth proportional to 208,531.80, 312,797.70 and 96,211.80 is: 144,317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,531.80 : 312,797.70 = 96,211.80 : x
  2. Step 2: Convert to fraction form
    208,531.80/312,797.70 = 96,211.80/x
  3. Step 3: Cross multiply
    208,531.80x = 312,797.70 × 96,211.80
  4. Step 4: Simplify right side
    208,531.80x = 30,094,829,752.86
  5. Step 5: Solve for x
    x = 30,094,829,752.86/208,531.80
  6. Step 6: Final answer
    x = 144,317.70

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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.