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Finding the Fourth Proportional to 108,571.14, 149,828.10 and 66,129.66

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Solution

The fourth proportional to 108,571.14, 149,828.10 and 66,129.66 is: 91,258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,571.14 : 149,828.10 = 66,129.66 : x
  2. Step 2: Convert to fraction form
    108,571.14/149,828.10 = 66,129.66/x
  3. Step 3: Cross multiply
    108,571.14x = 149,828.10 × 66,129.66
  4. Step 4: Simplify right side
    108,571.14x = 9,908,081,311.45
  5. Step 5: Solve for x
    x = 9,908,081,311.45/108,571.14
  6. Step 6: Final answer
    x = 91,258.89

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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.