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Finding the Fourth Proportional to 159,450.50, 220,041.69 and 87,830.30

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Solution

The fourth proportional to 159,450.50, 220,041.69 and 87,830.30 is: 121,205.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,450.50 : 220,041.69 = 87,830.30 : x
  2. Step 2: Convert to fraction form
    159,450.50/220,041.69 = 87,830.30/x
  3. Step 3: Cross multiply
    159,450.50x = 220,041.69 × 87,830.30
  4. Step 4: Simplify right side
    159,450.50x = 19,326,327,645.21
  5. Step 5: Solve for x
    x = 19,326,327,645.21/159,450.50
  6. Step 6: Final answer
    x = 121,205.81

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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.