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Finding the Fourth Proportional to 123,122, 169,908.36 and 70,130

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Solution

The fourth proportional to 123,122, 169,908.36 and 70,130 is: 96,779.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,122 : 169,908.36 = 70,130 : x
  2. Step 2: Convert to fraction form
    123,122/169,908.36 = 70,130/x
  3. Step 3: Cross multiply
    123,122x = 169,908.36 × 70,130
  4. Step 4: Simplify right side
    123,122x = 11,915,673,286.80
  5. Step 5: Solve for x
    x = 11,915,673,286.80/123,122
  6. Step 6: Final answer
    x = 96,779.40

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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.