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Finding the Fourth Proportional to 123,687, 170,686.44 and 67,100.40

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Solution

The fourth proportional to 123,687, 170,686.44 and 67,100.40 is: 92,597.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,687 : 170,686.44 = 67,100.40 : x
  2. Step 2: Convert to fraction form
    123,687/170,686.44 = 67,100.40/x
  3. Step 3: Cross multiply
    123,687x = 170,686.44 × 67,100.40
  4. Step 4: Simplify right side
    123,687x = 11,453,128,398.58
  5. Step 5: Solve for x
    x = 11,453,128,398.58/123,687
  6. Step 6: Final answer
    x = 92,597.67

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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.