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Finding the Fourth Proportional to 76,171.84, 105,317.82 and 66,713.32

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Solution

The fourth proportional to 76,171.84, 105,317.82 and 66,713.32 is: 92,240.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,171.84 : 105,317.82 = 66,713.32 : x
  2. Step 2: Convert to fraction form
    76,171.84/105,317.82 = 66,713.32/x
  3. Step 3: Cross multiply
    76,171.84x = 105,317.82 × 66,713.32
  4. Step 4: Simplify right side
    76,171.84x = 7,026,101,427.36
  5. Step 5: Solve for x
    x = 7,026,101,427.36/76,171.84
  6. Step 6: Final answer
    x = 92,240.14

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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.