Home / 143,789.09-215,685-38,608.05

Finding the Fourth Proportional to 143,789.09, 215,685 and 38,608.05

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Solution

The fourth proportional to 143,789.09, 215,685 and 38,608.05 is: 57,912.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,789.09 : 215,685 = 38,608.05 : x
  2. Step 2: Convert to fraction form
    143,789.09/215,685 = 38,608.05/x
  3. Step 3: Cross multiply
    143,789.09x = 215,685 × 38,608.05
  4. Step 4: Simplify right side
    143,789.09x = 8,327,178,073.07
  5. Step 5: Solve for x
    x = 8,327,178,073.07/143,789.09
  6. Step 6: Final answer
    x = 57,912.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.