Home / 80,861.70-121,292.55-45,869.70

Finding the Fourth Proportional to 80,861.70, 121,292.55 and 45,869.70

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Solution

The fourth proportional to 80,861.70, 121,292.55 and 45,869.70 is: 68,804.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861.70 : 121,292.55 = 45,869.70 : x
  2. Step 2: Convert to fraction form
    80,861.70/121,292.55 = 45,869.70/x
  3. Step 3: Cross multiply
    80,861.70x = 121,292.55 × 45,869.70
  4. Step 4: Simplify right side
    80,861.70x = 5,563,652,880.74
  5. Step 5: Solve for x
    x = 5,563,652,880.74/80,861.70
  6. Step 6: Final answer
    x = 68,804.55

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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.