Home / 186,947.70-280,421.55-76,139.70

Finding the Fourth Proportional to 186,947.70, 280,421.55 and 76,139.70

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Solution

The fourth proportional to 186,947.70, 280,421.55 and 76,139.70 is: 114,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,947.70 : 280,421.55 = 76,139.70 : x
  2. Step 2: Convert to fraction form
    186,947.70/280,421.55 = 76,139.70/x
  3. Step 3: Cross multiply
    186,947.70x = 280,421.55 × 76,139.70
  4. Step 4: Simplify right side
    186,947.70x = 21,351,212,690.54
  5. Step 5: Solve for x
    x = 21,351,212,690.54/186,947.70
  6. Step 6: Final answer
    x = 114,209.55

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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.