Home / 137,865.39-190,205.78-90,146.67

Finding the Fourth Proportional to 137,865.39, 190,205.78 and 90,146.67

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Solution

The fourth proportional to 137,865.39, 190,205.78 and 90,146.67 is: 124,370.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,865.39 : 190,205.78 = 90,146.67 : x
  2. Step 2: Convert to fraction form
    137,865.39/190,205.78 = 90,146.67/x
  3. Step 3: Cross multiply
    137,865.39x = 190,205.78 × 90,146.67
  4. Step 4: Simplify right side
    137,865.39x = 17,146,416,956.09
  5. Step 5: Solve for x
    x = 17,146,416,956.09/137,865.39
  6. Step 6: Final answer
    x = 124,370.72

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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.