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Finding the Fourth Proportional to 53,920,918.80, 80,881,378.20 and 40,483,990.80

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Solution

The fourth proportional to 53,920,918.80, 80,881,378.20 and 40,483,990.80 is: 60,725,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,920,918.80 : 80,881,378.20 = 40,483,990.80 : x
  2. Step 2: Convert to fraction form
    53,920,918.80/80,881,378.20 = 40,483,990.80/x
  3. Step 3: Cross multiply
    53,920,918.80x = 80,881,378.20 × 40,483,990.80
  4. Step 4: Simplify right side
    53,920,918.80x = 3,274,400,970,940,120.50
  5. Step 5: Solve for x
    x = 3,274,400,970,940,120.50/53,920,918.80
  6. Step 6: Final answer
    x = 60,725,986.20

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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.