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Finding the Fourth Proportional to 187,405.56, 281,145.90 and 69,077.40

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Solution

The fourth proportional to 187,405.56, 281,145.90 and 69,077.40 is: 103,629.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,405.56 : 281,145.90 = 69,077.40 : x
  2. Step 2: Convert to fraction form
    187,405.56/281,145.90 = 69,077.40/x
  3. Step 3: Cross multiply
    187,405.56x = 281,145.90 × 69,077.40
  4. Step 4: Simplify right side
    187,405.56x = 19,420,827,792.66
  5. Step 5: Solve for x
    x = 19,420,827,792.66/187,405.56
  6. Step 6: Final answer
    x = 103,629.94

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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.