Home / 260,059.20-390,127.58-80,129.58

Finding the Fourth Proportional to 260,059.20, 390,127.58 and 80,129.58

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Solution

The fourth proportional to 260,059.20, 390,127.58 and 80,129.58 is: 120,206.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,059.20 : 390,127.58 = 80,129.58 : x
  2. Step 2: Convert to fraction form
    260,059.20/390,127.58 = 80,129.58/x
  3. Step 3: Cross multiply
    260,059.20x = 390,127.58 × 80,129.58
  4. Step 4: Simplify right side
    260,059.20x = 31,260,759,131.82
  5. Step 5: Solve for x
    x = 31,260,759,131.82/260,059.20
  6. Step 6: Final answer
    x = 120,206.32

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1.5x scale

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.