Home / 109,880.40-163,896.85-99,789.78

Finding the Fourth Proportional to 109,880.40, 163,896.85 and 99,789.78

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Solution

The fourth proportional to 109,880.40, 163,896.85 and 99,789.78 is: 148,845.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,880.40 : 163,896.85 = 99,789.78 : x
  2. Step 2: Convert to fraction form
    109,880.40/163,896.85 = 99,789.78/x
  3. Step 3: Cross multiply
    109,880.40x = 163,896.85 × 99,789.78
  4. Step 4: Simplify right side
    109,880.40x = 16,355,230,604.19
  5. Step 5: Solve for x
    x = 16,355,230,604.19/109,880.40
  6. Step 6: Final answer
    x = 148,845.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.