Home / 140,569.20-193,986.90-76,909.68

Finding the Fourth Proportional to 140,569.20, 193,986.90 and 76,909.68

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Solution

The fourth proportional to 140,569.20, 193,986.90 and 76,909.68 is: 106,136.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,569.20 : 193,986.90 = 76,909.68 : x
  2. Step 2: Convert to fraction form
    140,569.20/193,986.90 = 76,909.68/x
  3. Step 3: Cross multiply
    140,569.20x = 193,986.90 × 76,909.68
  4. Step 4: Simplify right side
    140,569.20x = 14,919,470,403.19
  5. Step 5: Solve for x
    x = 14,919,470,403.19/140,569.20
  6. Step 6: Final answer
    x = 106,136.13

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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.