Home / 125,981.20-188,712.60-86,582.80

Finding the Fourth Proportional to 125,981.20, 188,712.60 and 86,582.80

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Solution

The fourth proportional to 125,981.20, 188,712.60 and 86,582.80 is: 129,696.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,981.20 : 188,712.60 = 86,582.80 : x
  2. Step 2: Convert to fraction form
    125,981.20/188,712.60 = 86,582.80/x
  3. Step 3: Cross multiply
    125,981.20x = 188,712.60 × 86,582.80
  4. Step 4: Simplify right side
    125,981.20x = 16,339,265,303.28
  5. Step 5: Solve for x
    x = 16,339,265,303.28/125,981.20
  6. Step 6: Final answer
    x = 129,696.06

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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.