Home / 128,062.84-191,618.51-80,455.04

Finding the Fourth Proportional to 128,062.84, 191,618.51 and 80,455.04

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Solution

The fourth proportional to 128,062.84, 191,618.51 and 80,455.04 is: 120,383.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,062.84 : 191,618.51 = 80,455.04 : x
  2. Step 2: Convert to fraction form
    128,062.84/191,618.51 = 80,455.04/x
  3. Step 3: Cross multiply
    128,062.84x = 191,618.51 × 80,455.04
  4. Step 4: Simplify right side
    128,062.84x = 15,416,674,697.55
  5. Step 5: Solve for x
    x = 15,416,674,697.55/128,062.84
  6. Step 6: Final answer
    x = 120,383.67

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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.