Home / 123,507.18-170,439.66-66,918.69

Finding the Fourth Proportional to 123,507.18, 170,439.66 and 66,918.69

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Solution

The fourth proportional to 123,507.18, 170,439.66 and 66,918.69 is: 92,347.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,507.18 : 170,439.66 = 66,918.69 : x
  2. Step 2: Convert to fraction form
    123,507.18/170,439.66 = 66,918.69/x
  3. Step 3: Cross multiply
    123,507.18x = 170,439.66 × 66,918.69
  4. Step 4: Simplify right side
    123,507.18x = 11,405,598,771.25
  5. Step 5: Solve for x
    x = 11,405,598,771.25/123,507.18
  6. Step 6: Final answer
    x = 92,347.66

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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.