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Finding the Fourth Proportional to 170,821.30, 256,231.95 and 76,051.30

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Solution

The fourth proportional to 170,821.30, 256,231.95 and 76,051.30 is: 114,076.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,821.30 : 256,231.95 = 76,051.30 : x
  2. Step 2: Convert to fraction form
    170,821.30/256,231.95 = 76,051.30/x
  3. Step 3: Cross multiply
    170,821.30x = 256,231.95 × 76,051.30
  4. Step 4: Simplify right side
    170,821.30x = 19,486,772,899.04
  5. Step 5: Solve for x
    x = 19,486,772,899.04/170,821.30
  6. Step 6: Final answer
    x = 114,076.95

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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.