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Finding the Fourth Proportional to 138,063.34, 190,866.93 and 136,800.35

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Solution

The fourth proportional to 138,063.34, 190,866.93 and 136,800.35 is: 189,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,063.34 : 190,866.93 = 136,800.35 : x
  2. Step 2: Convert to fraction form
    138,063.34/190,866.93 = 136,800.35/x
  3. Step 3: Cross multiply
    138,063.34x = 190,866.93 × 136,800.35
  4. Step 4: Simplify right side
    138,063.34x = 26,110,662,827.43
  5. Step 5: Solve for x
    x = 26,110,662,827.43/138,063.34
  6. Step 6: Final answer
    x = 189,120.90

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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.