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Finding the Fourth Proportional to 125,722.80, 188,802.90 and 66,673.80

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Solution

The fourth proportional to 125,722.80, 188,802.90 and 66,673.80 is: 100,126.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,722.80 : 188,802.90 = 66,673.80 : x
  2. Step 2: Convert to fraction form
    125,722.80/188,802.90 = 66,673.80/x
  3. Step 3: Cross multiply
    125,722.80x = 188,802.90 × 66,673.80
  4. Step 4: Simplify right side
    125,722.80x = 12,588,206,794.02
  5. Step 5: Solve for x
    x = 12,588,206,794.02/125,722.80
  6. Step 6: Final answer
    x = 100,126.68

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1.5x scale

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.