Home / 102,971.78-142,109.80-57,649.17

Finding the Fourth Proportional to 102,971.78, 142,109.80 and 57,649.17

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Solution

The fourth proportional to 102,971.78, 142,109.80 and 57,649.17 is: 79,560.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,971.78 : 142,109.80 = 57,649.17 : x
  2. Step 2: Convert to fraction form
    102,971.78/142,109.80 = 57,649.17/x
  3. Step 3: Cross multiply
    102,971.78x = 142,109.80 × 57,649.17
  4. Step 4: Simplify right side
    102,971.78x = 8,192,511,874.74
  5. Step 5: Solve for x
    x = 8,192,511,874.74/102,971.78
  6. Step 6: Final answer
    x = 79,560.75

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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.