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Finding the Fourth Proportional to 170,187.72, 255,354.48 and 70,420.44

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Solution

The fourth proportional to 170,187.72, 255,354.48 and 70,420.44 is: 105,660.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,187.72 : 255,354.48 = 70,420.44 : x
  2. Step 2: Convert to fraction form
    170,187.72/255,354.48 = 70,420.44/x
  3. Step 3: Cross multiply
    170,187.72x = 255,354.48 × 70,420.44
  4. Step 4: Simplify right side
    170,187.72x = 17,982,174,837.57
  5. Step 5: Solve for x
    x = 17,982,174,837.57/170,187.72
  6. Step 6: Final answer
    x = 105,660.82

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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.