Home / 260,195.77-390,319.61-70,659.21

Finding the Fourth Proportional to 260,195.77, 390,319.61 and 70,659.21

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Solution

The fourth proportional to 260,195.77, 390,319.61 and 70,659.21 is: 105,995.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,195.77 : 390,319.61 = 70,659.21 : x
  2. Step 2: Convert to fraction form
    260,195.77/390,319.61 = 70,659.21/x
  3. Step 3: Cross multiply
    260,195.77x = 390,319.61 × 70,659.21
  4. Step 4: Simplify right side
    260,195.77x = 27,579,675,290.11
  5. Step 5: Solve for x
    x = 27,579,675,290.11/260,195.77
  6. Step 6: Final answer
    x = 105,995.86

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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.