Home / 136,830.26-188,823.80-76,401.86

Finding the Fourth Proportional to 136,830.26, 188,823.80 and 76,401.86

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Solution

The fourth proportional to 136,830.26, 188,823.80 and 76,401.86 is: 105,433.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,830.26 : 188,823.80 = 76,401.86 : x
  2. Step 2: Convert to fraction form
    136,830.26/188,823.80 = 76,401.86/x
  3. Step 3: Cross multiply
    136,830.26x = 188,823.80 × 76,401.86
  4. Step 4: Simplify right side
    136,830.26x = 14,426,488,206.14
  5. Step 5: Solve for x
    x = 14,426,488,206.14/136,830.26
  6. Step 6: Final answer
    x = 105,433.47

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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.