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Finding the Fourth Proportional to 123,779.42, 170,815.44 and 67,190.78

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Solution

The fourth proportional to 123,779.42, 170,815.44 and 67,190.78 is: 92,723.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,779.42 : 170,815.44 = 67,190.78 : x
  2. Step 2: Convert to fraction form
    123,779.42/170,815.44 = 67,190.78/x
  3. Step 3: Cross multiply
    123,779.42x = 170,815.44 × 67,190.78
  4. Step 4: Simplify right side
    123,779.42x = 11,477,222,649.64
  5. Step 5: Solve for x
    x = 11,477,222,649.64/123,779.42
  6. Step 6: Final answer
    x = 92,723.19

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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.