Home / 79,147.18-118,709.77-19,979.25

Finding the Fourth Proportional to 79,147.18, 118,709.77 and 19,979.25

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Solution

The fourth proportional to 79,147.18, 118,709.77 and 19,979.25 is: 29,966.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,147.18 : 118,709.77 = 19,979.25 : x
  2. Step 2: Convert to fraction form
    79,147.18/118,709.77 = 19,979.25/x
  3. Step 3: Cross multiply
    79,147.18x = 118,709.77 × 19,979.25
  4. Step 4: Simplify right side
    79,147.18x = 2,371,732,172.27
  5. Step 5: Solve for x
    x = 2,371,732,172.27/79,147.18
  6. Step 6: Final answer
    x = 29,966.10

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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.