Home / 289,815.80-434,723.70-90,148.80

Finding the Fourth Proportional to 289,815.80, 434,723.70 and 90,148.80

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Solution

The fourth proportional to 289,815.80, 434,723.70 and 90,148.80 is: 135,223.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,815.80 : 434,723.70 = 90,148.80 : x
  2. Step 2: Convert to fraction form
    289,815.80/434,723.70 = 90,148.80/x
  3. Step 3: Cross multiply
    289,815.80x = 434,723.70 × 90,148.80
  4. Step 4: Simplify right side
    289,815.80x = 39,189,819,886.56
  5. Step 5: Solve for x
    x = 39,189,819,886.56/289,815.80
  6. Step 6: Final answer
    x = 135,223.20

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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.