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Finding the Fourth Proportional to 72,349.49, 99,843 and 40,084.79

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Solution

The fourth proportional to 72,349.49, 99,843 and 40,084.79 is: 55,317.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,349.49 : 99,843 = 40,084.79 : x
  2. Step 2: Convert to fraction form
    72,349.49/99,843 = 40,084.79/x
  3. Step 3: Cross multiply
    72,349.49x = 99,843 × 40,084.79
  4. Step 4: Simplify right side
    72,349.49x = 4,002,185,687.97
  5. Step 5: Solve for x
    x = 4,002,185,687.97/72,349.49
  6. Step 6: Final answer
    x = 55,317.40

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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.