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Finding the Fourth Proportional to 159,265.61, 219,786.57 and 87,645.63

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Solution

The fourth proportional to 159,265.61, 219,786.57 and 87,645.63 is: 120,950.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,265.61 : 219,786.57 = 87,645.63 : x
  2. Step 2: Convert to fraction form
    159,265.61/219,786.57 = 87,645.63/x
  3. Step 3: Cross multiply
    159,265.61x = 219,786.57 × 87,645.63
  4. Step 4: Simplify right side
    159,265.61x = 19,263,331,294.26
  5. Step 5: Solve for x
    x = 19,263,331,294.26/159,265.61
  6. Step 6: Final answer
    x = 120,950.98

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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.