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Finding the Fourth Proportional to 208,536,608.80, 312,710,434.80 and 79,101,200.80

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Solution

The fourth proportional to 208,536,608.80, 312,710,434.80 and 79,101,200.80 is: 118,615,964.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,536,608.80 : 312,710,434.80 = 79,101,200.80 : x
  2. Step 2: Convert to fraction form
    208,536,608.80/312,710,434.80 = 79,101,200.80/x
  3. Step 3: Cross multiply
    208,536,608.80x = 312,710,434.80 × 79,101,200.80
  4. Step 4: Simplify right side
    208,536,608.80x = 24,735,770,895,370,108
  5. Step 5: Solve for x
    x = 24,735,770,895,370,108/208,536,608.80
  6. Step 6: Final answer
    x = 118,615,964.06

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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.