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Finding the Fourth Proportional to 133,215.72, 183,832.32 and 72,784.84

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Solution

The fourth proportional to 133,215.72, 183,832.32 and 72,784.84 is: 100,440.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,215.72 : 183,832.32 = 72,784.84 : x
  2. Step 2: Convert to fraction form
    133,215.72/183,832.32 = 72,784.84/x
  3. Step 3: Cross multiply
    133,215.72x = 183,832.32 × 72,784.84
  4. Step 4: Simplify right side
    133,215.72x = 13,380,205,998.03
  5. Step 5: Solve for x
    x = 13,380,205,998.03/133,215.72
  6. Step 6: Final answer
    x = 100,440.14

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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.