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Finding the Fourth Proportional to 123,694.90, 170,693.71 and 69,980.83

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Solution

The fourth proportional to 123,694.90, 170,693.71 and 69,980.83 is: 96,570.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,694.90 : 170,693.71 = 69,980.83 : x
  2. Step 2: Convert to fraction form
    123,694.90/170,693.71 = 69,980.83/x
  3. Step 3: Cross multiply
    123,694.90x = 170,693.71 × 69,980.83
  4. Step 4: Simplify right side
    123,694.90x = 11,945,287,501.58
  5. Step 5: Solve for x
    x = 11,945,287,501.58/123,694.90
  6. Step 6: Final answer
    x = 96,570.57

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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.