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Finding the Fourth Proportional to 108,645.84, 149,932.62 and 66,208.32

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Solution

The fourth proportional to 108,645.84, 149,932.62 and 66,208.32 is: 91,368.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,645.84 : 149,932.62 = 66,208.32 : x
  2. Step 2: Convert to fraction form
    108,645.84/149,932.62 = 66,208.32/x
  3. Step 3: Cross multiply
    108,645.84x = 149,932.62 × 66,208.32
  4. Step 4: Simplify right side
    108,645.84x = 9,926,786,883.40
  5. Step 5: Solve for x
    x = 9,926,786,883.40/108,645.84
  6. Step 6: Final answer
    x = 91,368.31

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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.