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Finding the Fourth Proportional to 81,230.40, 121,842.40 and 25,824.32

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Solution

The fourth proportional to 81,230.40, 121,842.40 and 25,824.32 is: 38,735.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,230.40 : 121,842.40 = 25,824.32 : x
  2. Step 2: Convert to fraction form
    81,230.40/121,842.40 = 25,824.32/x
  3. Step 3: Cross multiply
    81,230.40x = 121,842.40 × 25,824.32
  4. Step 4: Simplify right side
    81,230.40x = 3,146,497,127.17
  5. Step 5: Solve for x
    x = 3,146,497,127.17/81,230.40
  6. Step 6: Final answer
    x = 38,735.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.