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Finding the Fourth Proportional to 133,173.72, 183,780.36 and 72,745.20

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Solution

The fourth proportional to 133,173.72, 183,780.36 and 72,745.20 is: 100,388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,173.72 : 183,780.36 = 72,745.20 : x
  2. Step 2: Convert to fraction form
    133,173.72/183,780.36 = 72,745.20/x
  3. Step 3: Cross multiply
    133,173.72x = 183,780.36 × 72,745.20
  4. Step 4: Simplify right side
    133,173.72x = 13,369,139,044.27
  5. Step 5: Solve for x
    x = 13,369,139,044.27/133,173.72
  6. Step 6: Final answer
    x = 100,388.72

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1.5x scale

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.