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Finding the Fourth Proportional to 187,174.79, 280,603.06 and 81,915.11

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Solution

The fourth proportional to 187,174.79, 280,603.06 and 81,915.11 is: 122,803.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,174.79 : 280,603.06 = 81,915.11 : x
  2. Step 2: Convert to fraction form
    187,174.79/280,603.06 = 81,915.11/x
  3. Step 3: Cross multiply
    187,174.79x = 280,603.06 × 81,915.11
  4. Step 4: Simplify right side
    187,174.79x = 22,985,628,918.43
  5. Step 5: Solve for x
    x = 22,985,628,918.43/187,174.79
  6. Step 6: Final answer
    x = 122,803.02

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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.