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Finding the Fourth Proportional to 208,627,612.60, 312,983,409.30 and 72,284,783.80

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Solution

The fourth proportional to 208,627,612.60, 312,983,409.30 and 72,284,783.80 is: 108,441,724.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,627,612.60 : 312,983,409.30 = 72,284,783.80 : x
  2. Step 2: Convert to fraction form
    208,627,612.60/312,983,409.30 = 72,284,783.80/x
  3. Step 3: Cross multiply
    208,627,612.60x = 312,983,409.30 × 72,284,783.80
  4. Step 4: Simplify right side
    208,627,612.60x = 22,623,938,074,237,408
  5. Step 5: Solve for x
    x = 22,623,938,074,237,408/208,627,612.60
  6. Step 6: Final answer
    x = 108,441,724.43

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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.