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Finding the Fourth Proportional to 117,305.84, 161,844 and 66,313.64

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Solution

The fourth proportional to 117,305.84, 161,844 and 66,313.64 is: 91,491.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,305.84 : 161,844 = 66,313.64 : x
  2. Step 2: Convert to fraction form
    117,305.84/161,844 = 66,313.64/x
  3. Step 3: Cross multiply
    117,305.84x = 161,844 × 66,313.64
  4. Step 4: Simplify right side
    117,305.84x = 10,732,464,752.16
  5. Step 5: Solve for x
    x = 10,732,464,752.16/117,305.84
  6. Step 6: Final answer
    x = 91,491.31

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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.