Home / 151,053.78-208,438.07-87,379.68

Finding the Fourth Proportional to 151,053.78, 208,438.07 and 87,379.68

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Solution

The fourth proportional to 151,053.78, 208,438.07 and 87,379.68 is: 120,574.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,053.78 : 208,438.07 = 87,379.68 : x
  2. Step 2: Convert to fraction form
    151,053.78/208,438.07 = 87,379.68/x
  3. Step 3: Cross multiply
    151,053.78x = 208,438.07 × 87,379.68
  4. Step 4: Simplify right side
    151,053.78x = 18,213,251,419.52
  5. Step 5: Solve for x
    x = 18,213,251,419.52/151,053.78
  6. Step 6: Final answer
    x = 120,574.62

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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.