Home / 136,146.50-187,685.21-90,129.03

Finding the Fourth Proportional to 136,146.50, 187,685.21 and 90,129.03

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Solution

The fourth proportional to 136,146.50, 187,685.21 and 90,129.03 is: 124,247.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,146.50 : 187,685.21 = 90,129.03 : x
  2. Step 2: Convert to fraction form
    136,146.50/187,685.21 = 90,129.03/x
  3. Step 3: Cross multiply
    136,146.50x = 187,685.21 × 90,129.03
  4. Step 4: Simplify right side
    136,146.50x = 16,915,885,922.65
  5. Step 5: Solve for x
    x = 16,915,885,922.65/136,146.50
  6. Step 6: Final answer
    x = 124,247.67

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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.