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Finding the Fourth Proportional to 139,138.86, 192,012.12 and 75,477.12

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Solution

The fourth proportional to 139,138.86, 192,012.12 and 75,477.12 is: 104,158.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,138.86 : 192,012.12 = 75,477.12 : x
  2. Step 2: Convert to fraction form
    139,138.86/192,012.12 = 75,477.12/x
  3. Step 3: Cross multiply
    139,138.86x = 192,012.12 × 75,477.12
  4. Step 4: Simplify right side
    139,138.86x = 14,492,521,102.65
  5. Step 5: Solve for x
    x = 14,492,521,102.65/139,138.86
  6. Step 6: Final answer
    x = 104,158.69

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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.