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Finding the Fourth Proportional to 123,898.42, 170,978.88 and 67,310.20

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Solution

The fourth proportional to 123,898.42, 170,978.88 and 67,310.20 is: 92,887.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,898.42 : 170,978.88 = 67,310.20 : x
  2. Step 2: Convert to fraction form
    123,898.42/170,978.88 = 67,310.20/x
  3. Step 3: Cross multiply
    123,898.42x = 170,978.88 × 67,310.20
  4. Step 4: Simplify right side
    123,898.42x = 11,508,622,608.58
  5. Step 5: Solve for x
    x = 11,508,622,608.58/123,898.42
  6. Step 6: Final answer
    x = 92,887.57

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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.