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Finding the Fourth Proportional to 139,847.15, 192,991.16 and 76,184.93

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Solution

The fourth proportional to 139,847.15, 192,991.16 and 76,184.93 is: 105,136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,847.15 : 192,991.16 = 76,184.93 : x
  2. Step 2: Convert to fraction form
    139,847.15/192,991.16 = 76,184.93/x
  3. Step 3: Cross multiply
    139,847.15x = 192,991.16 × 76,184.93
  4. Step 4: Simplify right side
    139,847.15x = 14,703,017,240.73
  5. Step 5: Solve for x
    x = 14,703,017,240.73/139,847.15
  6. Step 6: Final answer
    x = 105,136.34

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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.