Home / 143,786.40-215,679.60-90,642.30

Finding the Fourth Proportional to 143,786.40, 215,679.60 and 90,642.30

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Solution

The fourth proportional to 143,786.40, 215,679.60 and 90,642.30 is: 135,963.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,786.40 : 215,679.60 = 90,642.30 : x
  2. Step 2: Convert to fraction form
    143,786.40/215,679.60 = 90,642.30/x
  3. Step 3: Cross multiply
    143,786.40x = 215,679.60 × 90,642.30
  4. Step 4: Simplify right side
    143,786.40x = 19,549,695,007.08
  5. Step 5: Solve for x
    x = 19,549,695,007.08/143,786.40
  6. Step 6: Final answer
    x = 135,963.45

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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.