Home / 109,113.20-163,516.20-80,812.40

Finding the Fourth Proportional to 109,113.20, 163,516.20 and 80,812.40

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Solution

The fourth proportional to 109,113.20, 163,516.20 and 80,812.40 is: 121,104.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,113.20 : 163,516.20 = 80,812.40 : x
  2. Step 2: Convert to fraction form
    109,113.20/163,516.20 = 80,812.40/x
  3. Step 3: Cross multiply
    109,113.20x = 163,516.20 × 80,812.40
  4. Step 4: Simplify right side
    109,113.20x = 13,214,136,560.88
  5. Step 5: Solve for x
    x = 13,214,136,560.88/109,113.20
  6. Step 6: Final answer
    x = 121,104.84

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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.