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Finding the Fourth Proportional to 139,428.95, 192,412.13 and 79,003.67

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Solution

The fourth proportional to 139,428.95, 192,412.13 and 79,003.67 is: 109,025.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,428.95 : 192,412.13 = 79,003.67 : x
  2. Step 2: Convert to fraction form
    139,428.95/192,412.13 = 79,003.67/x
  3. Step 3: Cross multiply
    139,428.95x = 192,412.13 × 79,003.67
  4. Step 4: Simplify right side
    139,428.95x = 15,201,263,065.44
  5. Step 5: Solve for x
    x = 15,201,263,065.44/139,428.95
  6. Step 6: Final answer
    x = 109,025.16

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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.