Home / 109,125.28-149,940.20-86,730.40

Finding the Fourth Proportional to 109,125.28, 149,940.20 and 86,730.40

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Solution

The fourth proportional to 109,125.28, 149,940.20 and 86,730.40 is: 119,169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,125.28 : 149,940.20 = 86,730.40 : x
  2. Step 2: Convert to fraction form
    109,125.28/149,940.20 = 86,730.40/x
  3. Step 3: Cross multiply
    109,125.28x = 149,940.20 × 86,730.40
  4. Step 4: Simplify right side
    109,125.28x = 13,004,373,522.08
  5. Step 5: Solve for x
    x = 13,004,373,522.08/109,125.28
  6. Step 6: Final answer
    x = 119,169.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.