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Finding the Fourth Proportional to 133,359.88, 183,969.54 and 87,990.04

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Solution

The fourth proportional to 133,359.88, 183,969.54 and 87,990.04 is: 121,381.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,359.88 : 183,969.54 = 87,990.04 : x
  2. Step 2: Convert to fraction form
    133,359.88/183,969.54 = 87,990.04/x
  3. Step 3: Cross multiply
    133,359.88x = 183,969.54 × 87,990.04
  4. Step 4: Simplify right side
    133,359.88x = 16,187,487,183.38
  5. Step 5: Solve for x
    x = 16,187,487,183.38/133,359.88
  6. Step 6: Final answer
    x = 121,381.99

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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.