Home / 128,434.20-192,581.28-39,671.16

Finding the Fourth Proportional to 128,434.20, 192,581.28 and 39,671.16

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Solution

The fourth proportional to 128,434.20, 192,581.28 and 39,671.16 is: 59,485.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,434.20 : 192,581.28 = 39,671.16 : x
  2. Step 2: Convert to fraction form
    128,434.20/192,581.28 = 39,671.16/x
  3. Step 3: Cross multiply
    128,434.20x = 192,581.28 × 39,671.16
  4. Step 4: Simplify right side
    128,434.20x = 7,639,922,771.88
  5. Step 5: Solve for x
    x = 7,639,922,771.88/128,434.20
  6. Step 6: Final answer
    x = 59,485.11

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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.