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Finding the Fourth Proportional to 171,140.40, 256,537.80 and 77,713.20

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Solution

The fourth proportional to 171,140.40, 256,537.80 and 77,713.20 is: 116,491.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,140.40 : 256,537.80 = 77,713.20 : x
  2. Step 2: Convert to fraction form
    171,140.40/256,537.80 = 77,713.20/x
  3. Step 3: Cross multiply
    171,140.40x = 256,537.80 × 77,713.20
  4. Step 4: Simplify right side
    171,140.40x = 19,936,373,358.96
  5. Step 5: Solve for x
    x = 19,936,373,358.96/171,140.40
  6. Step 6: Final answer
    x = 116,491.33

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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.