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Finding the Fourth Proportional to 136,315.76, 188,119.92 and 74,230.35

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Solution

The fourth proportional to 136,315.76, 188,119.92 and 74,230.35 is: 102,440.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,315.76 : 188,119.92 = 74,230.35 : x
  2. Step 2: Convert to fraction form
    136,315.76/188,119.92 = 74,230.35/x
  3. Step 3: Cross multiply
    136,315.76x = 188,119.92 × 74,230.35
  4. Step 4: Simplify right side
    136,315.76x = 13,964,207,503.57
  5. Step 5: Solve for x
    x = 13,964,207,503.57/136,315.76
  6. Step 6: Final answer
    x = 102,440.16

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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.