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Finding the Fourth Proportional to 128,082.60, 191,778.30 and 128,082.60

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Solution

The fourth proportional to 128,082.60, 191,778.30 and 128,082.60 is: 191,778.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,082.60 : 191,778.30 = 128,082.60 : x
  2. Step 2: Convert to fraction form
    128,082.60/191,778.30 = 128,082.60/x
  3. Step 3: Cross multiply
    128,082.60x = 191,778.30 × 128,082.60
  4. Step 4: Simplify right side
    128,082.60x = 24,563,463,287.58
  5. Step 5: Solve for x
    x = 24,563,463,287.58/128,082.60
  6. Step 6: Final answer
    x = 191,778.30

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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.