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Finding the Fourth Proportional to 109,373.61, 150,603.43 and 90,181.47

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Solution

The fourth proportional to 109,373.61, 150,603.43 and 90,181.47 is: 124,176.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,373.61 : 150,603.43 = 90,181.47 : x
  2. Step 2: Convert to fraction form
    109,373.61/150,603.43 = 90,181.47/x
  3. Step 3: Cross multiply
    109,373.61x = 150,603.43 × 90,181.47
  4. Step 4: Simplify right side
    109,373.61x = 13,581,638,704.44
  5. Step 5: Solve for x
    x = 13,581,638,704.44/109,373.61
  6. Step 6: Final answer
    x = 124,176.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.