Home / 260,015,998.40-390,081,734.40-87,487,942.40

Finding the Fourth Proportional to 260,015,998.40, 390,081,734.40 and 87,487,942.40

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Solution

The fourth proportional to 260,015,998.40, 390,081,734.40 and 87,487,942.40 is: 131,251,340.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,015,998.40 : 390,081,734.40 = 87,487,942.40 : x
  2. Step 2: Convert to fraction form
    260,015,998.40/390,081,734.40 = 87,487,942.40/x
  3. Step 3: Cross multiply
    260,015,998.40x = 390,081,734.40 × 87,487,942.40
  4. Step 4: Simplify right side
    260,015,998.40x = 34,127,448,310,479,300
  5. Step 5: Solve for x
    x = 34,127,448,310,479,300/260,015,998.40
  6. Step 6: Final answer
    x = 131,251,340.38

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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.