Home / 72,420-108,625.14-19,829.94

Finding the Fourth Proportional to 72,420, 108,625.14 and 19,829.94

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Solution

The fourth proportional to 72,420, 108,625.14 and 19,829.94 is: 29,743.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,420 : 108,625.14 = 19,829.94 : x
  2. Step 2: Convert to fraction form
    72,420/108,625.14 = 19,829.94/x
  3. Step 3: Cross multiply
    72,420x = 108,625.14 × 19,829.94
  4. Step 4: Simplify right side
    72,420x = 2,154,030,008.69
  5. Step 5: Solve for x
    x = 2,154,030,008.69/72,420
  6. Step 6: Final answer
    x = 29,743.58

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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.