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Finding the Fourth Proportional to 123,643.41, 170,636.34 and 69,928.40

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Solution

The fourth proportional to 123,643.41, 170,636.34 and 69,928.40 is: 96,505.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,643.41 : 170,636.34 = 69,928.40 : x
  2. Step 2: Convert to fraction form
    123,643.41/170,636.34 = 69,928.40/x
  3. Step 3: Cross multiply
    123,643.41x = 170,636.34 × 69,928.40
  4. Step 4: Simplify right side
    123,643.41x = 11,932,325,384.87
  5. Step 5: Solve for x
    x = 11,932,325,384.87/123,643.41
  6. Step 6: Final answer
    x = 96,505.96

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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.