Home / 151,421.13-208,958.54-87,764.85

Finding the Fourth Proportional to 151,421.13, 208,958.54 and 87,764.85

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Solution

The fourth proportional to 151,421.13, 208,958.54 and 87,764.85 is: 121,113.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,421.13 : 208,958.54 = 87,764.85 : x
  2. Step 2: Convert to fraction form
    151,421.13/208,958.54 = 87,764.85/x
  3. Step 3: Cross multiply
    151,421.13x = 208,958.54 × 87,764.85
  4. Step 4: Simplify right side
    151,421.13x = 18,339,214,480.49
  5. Step 5: Solve for x
    x = 18,339,214,480.49/151,421.13
  6. Step 6: Final answer
    x = 121,113.97

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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.