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Finding the Fourth Proportional to 99,399.64, 137,171.44 and 56,982.76

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Solution

The fourth proportional to 99,399.64, 137,171.44 and 56,982.76 is: 78,636.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,399.64 : 137,171.44 = 56,982.76 : x
  2. Step 2: Convert to fraction form
    99,399.64/137,171.44 = 56,982.76/x
  3. Step 3: Cross multiply
    99,399.64x = 137,171.44 × 56,982.76
  4. Step 4: Simplify right side
    99,399.64x = 7,816,407,244.37
  5. Step 5: Solve for x
    x = 7,816,407,244.37/99,399.64
  6. Step 6: Final answer
    x = 78,636.17

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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.