Home / 278,986,830.80-418,291,289.40-142,560,021.20

Finding the Fourth Proportional to 278,986,830.80, 418,291,289.40 and 142,560,021.20

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Solution

The fourth proportional to 278,986,830.80, 418,291,289.40 and 142,560,021.20 is: 213,743,476.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,986,830.80 : 418,291,289.40 = 142,560,021.20 : x
  2. Step 2: Convert to fraction form
    278,986,830.80/418,291,289.40 = 142,560,021.20/x
  3. Step 3: Cross multiply
    278,986,830.80x = 418,291,289.40 × 142,560,021.20
  4. Step 4: Simplify right side
    278,986,830.80x = 59,631,615,084,639,328
  5. Step 5: Solve for x
    x = 59,631,615,084,639,328/278,986,830.80
  6. Step 6: Final answer
    x = 213,743,476.40

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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.