Home / 79,142-118,711.65-19,977.24

Finding the Fourth Proportional to 79,142, 118,711.65 and 19,977.24

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Solution

The fourth proportional to 79,142, 118,711.65 and 19,977.24 is: 29,965.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,142 : 118,711.65 = 19,977.24 : x
  2. Step 2: Convert to fraction form
    79,142/118,711.65 = 19,977.24/x
  3. Step 3: Cross multiply
    79,142x = 118,711.65 × 19,977.24
  4. Step 4: Simplify right side
    79,142x = 2,371,531,122.85
  5. Step 5: Solve for x
    x = 2,371,531,122.85/79,142
  6. Step 6: Final answer
    x = 29,965.52

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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.