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Finding the Fourth Proportional to 71,994,420.80, 107,991,631.20 and 18,141,732.80

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Solution

The fourth proportional to 71,994,420.80, 107,991,631.20 and 18,141,732.80 is: 27,212,599.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994,420.80 : 107,991,631.20 = 18,141,732.80 : x
  2. Step 2: Convert to fraction form
    71,994,420.80/107,991,631.20 = 18,141,732.80/x
  3. Step 3: Cross multiply
    71,994,420.80x = 107,991,631.20 × 18,141,732.80
  4. Step 4: Simplify right side
    71,994,420.80x = 1,959,155,317,866,543.50
  5. Step 5: Solve for x
    x = 1,959,155,317,866,543.50/71,994,420.80
  6. Step 6: Final answer
    x = 27,212,599.20

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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.