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Finding the Fourth Proportional to 120,266.34, 180,603.63 and 104,490.78

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Solution

The fourth proportional to 120,266.34, 180,603.63 and 104,490.78 is: 156,913.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,266.34 : 180,603.63 = 104,490.78 : x
  2. Step 2: Convert to fraction form
    120,266.34/180,603.63 = 104,490.78/x
  3. Step 3: Cross multiply
    120,266.34x = 180,603.63 × 104,490.78
  4. Step 4: Simplify right side
    120,266.34x = 18,871,414,169.53
  5. Step 5: Solve for x
    x = 18,871,414,169.53/120,266.34
  6. Step 6: Final answer
    x = 156,913.52

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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.