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Finding the Fourth Proportional to 123,557.67, 170,507.74 and 69,840.80

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Solution

The fourth proportional to 123,557.67, 170,507.74 and 69,840.80 is: 96,379.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,557.67 : 170,507.74 = 69,840.80 : x
  2. Step 2: Convert to fraction form
    123,557.67/170,507.74 = 69,840.80/x
  3. Step 3: Cross multiply
    123,557.67x = 170,507.74 × 69,840.80
  4. Step 4: Simplify right side
    123,557.67x = 11,908,396,967.79
  5. Step 5: Solve for x
    x = 11,908,396,967.79/123,557.67
  6. Step 6: Final answer
    x = 96,379.26

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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.