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Finding the Fourth Proportional to 253,972,406.55, 380,958,609.83 and 81,466,657.95

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Solution

The fourth proportional to 253,972,406.55, 380,958,609.83 and 81,466,657.95 is: 122,199,986.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,972,406.55 : 380,958,609.83 = 81,466,657.95 : x
  2. Step 2: Convert to fraction form
    253,972,406.55/380,958,609.83 = 81,466,657.95/x
  3. Step 3: Cross multiply
    253,972,406.55x = 380,958,609.83 × 81,466,657.95
  4. Step 4: Simplify right side
    253,972,406.55x = 31,035,424,759,720,784
  5. Step 5: Solve for x
    x = 31,035,424,759,720,784/253,972,406.55
  6. Step 6: Final answer
    x = 122,199,986.93

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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.