Home / 109,415.20-164,187.60-79,758.40

Finding the Fourth Proportional to 109,415.20, 164,187.60 and 79,758.40

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Solution

The fourth proportional to 109,415.20, 164,187.60 and 79,758.40 is: 119,684.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,415.20 : 164,187.60 = 79,758.40 : x
  2. Step 2: Convert to fraction form
    109,415.20/164,187.60 = 79,758.40/x
  3. Step 3: Cross multiply
    109,415.20x = 164,187.60 × 79,758.40
  4. Step 4: Simplify right side
    109,415.20x = 13,095,340,275.84
  5. Step 5: Solve for x
    x = 13,095,340,275.84/109,415.20
  6. Step 6: Final answer
    x = 119,684.84

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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.