Home / 259,445.60-389,136.18-69,920.79

Finding the Fourth Proportional to 259,445.60, 389,136.18 and 69,920.79

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Solution

The fourth proportional to 259,445.60, 389,136.18 and 69,920.79 is: 104,872.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,445.60 : 389,136.18 = 69,920.79 : x
  2. Step 2: Convert to fraction form
    259,445.60/389,136.18 = 69,920.79/x
  3. Step 3: Cross multiply
    259,445.60x = 389,136.18 × 69,920.79
  4. Step 4: Simplify right side
    259,445.60x = 27,208,707,926.12
  5. Step 5: Solve for x
    x = 27,208,707,926.12/259,445.60
  6. Step 6: Final answer
    x = 104,872.50

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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.