Home / 128,328.90-192,821.40-113,894.70

Finding the Fourth Proportional to 128,328.90, 192,821.40 and 113,894.70

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Solution

The fourth proportional to 128,328.90, 192,821.40 and 113,894.70 is: 171,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328.90 : 192,821.40 = 113,894.70 : x
  2. Step 2: Convert to fraction form
    128,328.90/192,821.40 = 113,894.70/x
  3. Step 3: Cross multiply
    128,328.90x = 192,821.40 × 113,894.70
  4. Step 4: Simplify right side
    128,328.90x = 21,961,335,506.58
  5. Step 5: Solve for x
    x = 21,961,335,506.58/128,328.90
  6. Step 6: Final answer
    x = 171,133.20

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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.