Home / 139,484.20-192,487-75,821.80

Finding the Fourth Proportional to 139,484.20, 192,487 and 75,821.80

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Solution

The fourth proportional to 139,484.20, 192,487 and 75,821.80 is: 104,633.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,484.20 : 192,487 = 75,821.80 : x
  2. Step 2: Convert to fraction form
    139,484.20/192,487 = 75,821.80/x
  3. Step 3: Cross multiply
    139,484.20x = 192,487 × 75,821.80
  4. Step 4: Simplify right side
    139,484.20x = 14,594,710,816.60
  5. Step 5: Solve for x
    x = 14,594,710,816.60/139,484.20
  6. Step 6: Final answer
    x = 104,633.43

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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.