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Finding the Fourth Proportional to 159,399.39, 219,971.19 and 87,779.24

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Solution

The fourth proportional to 159,399.39, 219,971.19 and 87,779.24 is: 121,135.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,399.39 : 219,971.19 = 87,779.24 : x
  2. Step 2: Convert to fraction form
    159,399.39/219,971.19 = 87,779.24/x
  3. Step 3: Cross multiply
    159,399.39x = 219,971.19 × 87,779.24
  4. Step 4: Simplify right side
    159,399.39x = 19,308,903,991.13
  5. Step 5: Solve for x
    x = 19,308,903,991.13/159,399.39
  6. Step 6: Final answer
    x = 121,135.37

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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.