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Finding the Fourth Proportional to 123,854.32, 170,920.92 and 70,137.88

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Solution

The fourth proportional to 123,854.32, 170,920.92 and 70,137.88 is: 96,791.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,854.32 : 170,920.92 = 70,137.88 : x
  2. Step 2: Convert to fraction form
    123,854.32/170,920.92 = 70,137.88/x
  3. Step 3: Cross multiply
    123,854.32x = 170,920.92 × 70,137.88
  4. Step 4: Simplify right side
    123,854.32x = 11,988,030,976.45
  5. Step 5: Solve for x
    x = 11,988,030,976.45/123,854.32
  6. Step 6: Final answer
    x = 96,791.38

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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.