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Finding the Fourth Proportional to 210,383,999.80, 315,575,999.70 and 124,163,711.80

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Solution

The fourth proportional to 210,383,999.80, 315,575,999.70 and 124,163,711.80 is: 186,245,567.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,383,999.80 : 315,575,999.70 = 124,163,711.80 : x
  2. Step 2: Convert to fraction form
    210,383,999.80/315,575,999.70 = 124,163,711.80/x
  3. Step 3: Cross multiply
    210,383,999.80x = 315,575,999.70 × 124,163,711.80
  4. Step 4: Simplify right side
    210,383,999.80x = 39,183,087,477,747,688
  5. Step 5: Solve for x
    x = 39,183,087,477,747,688/210,383,999.80
  6. Step 6: Final answer
    x = 186,245,567.70

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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.