Home / 393,984,805.80-590,977,208.70-121,320,143.40

Finding the Fourth Proportional to 393,984,805.80, 590,977,208.70 and 121,320,143.40

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Solution

The fourth proportional to 393,984,805.80, 590,977,208.70 and 121,320,143.40 is: 181,980,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,984,805.80 : 590,977,208.70 = 121,320,143.40 : x
  2. Step 2: Convert to fraction form
    393,984,805.80/590,977,208.70 = 121,320,143.40/x
  3. Step 3: Cross multiply
    393,984,805.80x = 590,977,208.70 × 121,320,143.40
  4. Step 4: Simplify right side
    393,984,805.80x = 71,697,439,705,615,736
  5. Step 5: Solve for x
    x = 71,697,439,705,615,736/393,984,805.80
  6. Step 6: Final answer
    x = 181,980,215.10

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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.