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Finding the Fourth Proportional to 170,890.40, 256,335.60 and 71,017.40

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Solution

The fourth proportional to 170,890.40, 256,335.60 and 71,017.40 is: 106,526.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,890.40 : 256,335.60 = 71,017.40 : x
  2. Step 2: Convert to fraction form
    170,890.40/256,335.60 = 71,017.40/x
  3. Step 3: Cross multiply
    170,890.40x = 256,335.60 × 71,017.40
  4. Step 4: Simplify right side
    170,890.40x = 18,204,287,839.44
  5. Step 5: Solve for x
    x = 18,204,287,839.44/170,890.40
  6. Step 6: Final answer
    x = 106,526.10

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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.