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Finding the Fourth Proportional to 99,312.49, 137,049.60 and 53,991.60

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Solution

The fourth proportional to 99,312.49, 137,049.60 and 53,991.60 is: 74,507.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,312.49 : 137,049.60 = 53,991.60 : x
  2. Step 2: Convert to fraction form
    99,312.49/137,049.60 = 53,991.60/x
  3. Step 3: Cross multiply
    99,312.49x = 137,049.60 × 53,991.60
  4. Step 4: Simplify right side
    99,312.49x = 7,399,527,183.36
  5. Step 5: Solve for x
    x = 7,399,527,183.36/99,312.49
  6. Step 6: Final answer
    x = 74,507.52

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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.