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Finding the Fourth Proportional to 159,009.59, 219,438.50 and 87,392.15

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Solution

The fourth proportional to 159,009.59, 219,438.50 and 87,392.15 is: 120,604.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,009.59 : 219,438.50 = 87,392.15 : x
  2. Step 2: Convert to fraction form
    159,009.59/219,438.50 = 87,392.15/x
  3. Step 3: Cross multiply
    159,009.59x = 219,438.50 × 87,392.15
  4. Step 4: Simplify right side
    159,009.59x = 19,177,201,870.81
  5. Step 5: Solve for x
    x = 19,177,201,870.81/159,009.59
  6. Step 6: Final answer
    x = 120,604.06

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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.