Home / 136,121.04-187,847.64-79,520.40

Finding the Fourth Proportional to 136,121.04, 187,847.64 and 79,520.40

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Solution

The fourth proportional to 136,121.04, 187,847.64 and 79,520.40 is: 109,738.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,121.04 : 187,847.64 = 79,520.40 : x
  2. Step 2: Convert to fraction form
    136,121.04/187,847.64 = 79,520.40/x
  3. Step 3: Cross multiply
    136,121.04x = 187,847.64 × 79,520.40
  4. Step 4: Simplify right side
    136,121.04x = 14,937,719,471.86
  5. Step 5: Solve for x
    x = 14,937,719,471.86/136,121.04
  6. Step 6: Final answer
    x = 109,738.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.