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Finding the Fourth Proportional to 80,947.70, 121,421.55 and 80,947.70

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Solution

The fourth proportional to 80,947.70, 121,421.55 and 80,947.70 is: 121,421.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,947.70 : 121,421.55 = 80,947.70 : x
  2. Step 2: Convert to fraction form
    80,947.70/121,421.55 = 80,947.70/x
  3. Step 3: Cross multiply
    80,947.70x = 121,421.55 × 80,947.70
  4. Step 4: Simplify right side
    80,947.70x = 9,828,795,202.94
  5. Step 5: Solve for x
    x = 9,828,795,202.94/80,947.70
  6. Step 6: Final answer
    x = 121,421.55

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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.