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Finding the Fourth Proportional to 159,317.32, 219,832.20 and 91,321.80

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Solution

The fourth proportional to 159,317.32, 219,832.20 and 91,321.80 is: 126,009.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,317.32 : 219,832.20 = 91,321.80 : x
  2. Step 2: Convert to fraction form
    159,317.32/219,832.20 = 91,321.80/x
  3. Step 3: Cross multiply
    159,317.32x = 219,832.20 × 91,321.80
  4. Step 4: Simplify right side
    159,317.32x = 20,075,472,201.96
  5. Step 5: Solve for x
    x = 20,075,472,201.96/159,317.32
  6. Step 6: Final answer
    x = 126,009.35

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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.