Home / 102,979.89-142,104.65-57,647.43

Finding the Fourth Proportional to 102,979.89, 142,104.65 and 57,647.43

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Solution

The fourth proportional to 102,979.89, 142,104.65 and 57,647.43 is: 79,549.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,979.89 : 142,104.65 = 57,647.43 : x
  2. Step 2: Convert to fraction form
    102,979.89/142,104.65 = 57,647.43/x
  3. Step 3: Cross multiply
    102,979.89x = 142,104.65 × 57,647.43
  4. Step 4: Simplify right side
    102,979.89x = 8,191,967,575.31
  5. Step 5: Solve for x
    x = 8,191,967,575.31/102,979.89
  6. Step 6: Final answer
    x = 79,549.20

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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.