Home / 109,436.80-164,155.20-90,774.40

Finding the Fourth Proportional to 109,436.80, 164,155.20 and 90,774.40

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Solution

The fourth proportional to 109,436.80, 164,155.20 and 90,774.40 is: 136,161.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,436.80 : 164,155.20 = 90,774.40 : x
  2. Step 2: Convert to fraction form
    109,436.80/164,155.20 = 90,774.40/x
  3. Step 3: Cross multiply
    109,436.80x = 164,155.20 × 90,774.40
  4. Step 4: Simplify right side
    109,436.80x = 14,901,089,786.88
  5. Step 5: Solve for x
    x = 14,901,089,786.88/109,436.80
  6. Step 6: Final answer
    x = 136,161.60

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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.