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Finding the Fourth Proportional to 235,485.60, 324,984.30 and 138,753.92

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Solution

The fourth proportional to 235,485.60, 324,984.30 and 138,753.92 is: 191,488.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,485.60 : 324,984.30 = 138,753.92 : x
  2. Step 2: Convert to fraction form
    235,485.60/324,984.30 = 138,753.92/x
  3. Step 3: Cross multiply
    235,485.60x = 324,984.30 × 138,753.92
  4. Step 4: Simplify right side
    235,485.60x = 45,092,843,244.76
  5. Step 5: Solve for x
    x = 45,092,843,244.76/235,485.60
  6. Step 6: Final answer
    x = 191,488.75

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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.