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Finding the Fourth Proportional to 158,399.64, 218,590.86 and 86,779.56

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Solution

The fourth proportional to 158,399.64, 218,590.86 and 86,779.56 is: 119,755.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,399.64 : 218,590.86 = 86,779.56 : x
  2. Step 2: Convert to fraction form
    158,399.64/218,590.86 = 86,779.56/x
  3. Step 3: Cross multiply
    158,399.64x = 218,590.86 × 86,779.56
  4. Step 4: Simplify right side
    158,399.64x = 18,969,218,650.82
  5. Step 5: Solve for x
    x = 18,969,218,650.82/158,399.64
  6. Step 6: Final answer
    x = 119,755.44

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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.