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Finding the Fourth Proportional to 123,858.50, 170,919.01 and 70,143.90

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Solution

The fourth proportional to 123,858.50, 170,919.01 and 70,143.90 is: 96,795.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,858.50 : 170,919.01 = 70,143.90 : x
  2. Step 2: Convert to fraction form
    123,858.50/170,919.01 = 70,143.90/x
  3. Step 3: Cross multiply
    123,858.50x = 170,919.01 × 70,143.90
  4. Step 4: Simplify right side
    123,858.50x = 11,988,926,033.22
  5. Step 5: Solve for x
    x = 11,988,926,033.22/123,858.50
  6. Step 6: Final answer
    x = 96,795.34

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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.