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Finding the Fourth Proportional to 79,569.88, 119,409.06 and 42,128.44

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Solution

The fourth proportional to 79,569.88, 119,409.06 and 42,128.44 is: 63,221.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,569.88 : 119,409.06 = 42,128.44 : x
  2. Step 2: Convert to fraction form
    79,569.88/119,409.06 = 42,128.44/x
  3. Step 3: Cross multiply
    79,569.88x = 119,409.06 × 42,128.44
  4. Step 4: Simplify right side
    79,569.88x = 5,030,517,419.67
  5. Step 5: Solve for x
    x = 5,030,517,419.67/79,569.88
  6. Step 6: Final answer
    x = 63,221.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.