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Finding the Fourth Proportional to 128,082.58, 192,082.34 and 42,670.66

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Solution

The fourth proportional to 128,082.58, 192,082.34 and 42,670.66 is: 63,992.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,082.58 : 192,082.34 = 42,670.66 : x
  2. Step 2: Convert to fraction form
    128,082.58/192,082.34 = 42,670.66/x
  3. Step 3: Cross multiply
    128,082.58x = 192,082.34 × 42,670.66
  4. Step 4: Simplify right side
    128,082.58x = 8,196,280,222.14
  5. Step 5: Solve for x
    x = 8,196,280,222.14/128,082.58
  6. Step 6: Final answer
    x = 63,992.15

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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.