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Finding the Fourth Proportional to 138,063.84, 190,867.62 and 136,800.85

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Solution

The fourth proportional to 138,063.84, 190,867.62 and 136,800.85 is: 189,121.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,063.84 : 190,867.62 = 136,800.85 : x
  2. Step 2: Convert to fraction form
    138,063.84/190,867.62 = 136,800.85/x
  3. Step 3: Cross multiply
    138,063.84x = 190,867.62 × 136,800.85
  4. Step 4: Simplify right side
    138,063.84x = 26,110,851,699.14
  5. Step 5: Solve for x
    x = 26,110,851,699.14/138,063.84
  6. Step 6: Final answer
    x = 189,121.59

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1.5x scale

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.