Home / 390,026,145.20-585,039,217.80-131,155,329.20

Finding the Fourth Proportional to 390,026,145.20, 585,039,217.80 and 131,155,329.20

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Solution

The fourth proportional to 390,026,145.20, 585,039,217.80 and 131,155,329.20 is: 196,732,993.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,026,145.20 : 585,039,217.80 = 131,155,329.20 : x
  2. Step 2: Convert to fraction form
    390,026,145.20/585,039,217.80 = 131,155,329.20/x
  3. Step 3: Cross multiply
    390,026,145.20x = 585,039,217.80 × 131,155,329.20
  4. Step 4: Simplify right side
    390,026,145.20x = 76,731,011,205,469,488
  5. Step 5: Solve for x
    x = 76,731,011,205,469,488/390,026,145.20
  6. Step 6: Final answer
    x = 196,732,993.80

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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.