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Finding the Fourth Proportional to 187,368.16, 281,055.90 and 68,978.56

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Solution

The fourth proportional to 187,368.16, 281,055.90 and 68,978.56 is: 103,469.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,368.16 : 281,055.90 = 68,978.56 : x
  2. Step 2: Convert to fraction form
    187,368.16/281,055.90 = 68,978.56/x
  3. Step 3: Cross multiply
    187,368.16x = 281,055.90 × 68,978.56
  4. Step 4: Simplify right side
    187,368.16x = 19,386,831,261.50
  5. Step 5: Solve for x
    x = 19,386,831,261.50/187,368.16
  6. Step 6: Final answer
    x = 103,469.19

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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.