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Finding the Fourth Proportional to 159,435.12, 220,030.46 and 87,815.12

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Solution

The fourth proportional to 159,435.12, 220,030.46 and 87,815.12 is: 121,190.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,435.12 : 220,030.46 = 87,815.12 : x
  2. Step 2: Convert to fraction form
    159,435.12/220,030.46 = 87,815.12/x
  3. Step 3: Cross multiply
    159,435.12x = 220,030.46 × 87,815.12
  4. Step 4: Simplify right side
    159,435.12x = 19,322,001,248.56
  5. Step 5: Solve for x
    x = 19,322,001,248.56/159,435.12
  6. Step 6: Final answer
    x = 121,190.37

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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.