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Finding the Fourth Proportional to 151,630.88, 209,252 and 87,969.76

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Solution

The fourth proportional to 151,630.88, 209,252 and 87,969.76 is: 121,399.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,630.88 : 209,252 = 87,969.76 : x
  2. Step 2: Convert to fraction form
    151,630.88/209,252 = 87,969.76/x
  3. Step 3: Cross multiply
    151,630.88x = 209,252 × 87,969.76
  4. Step 4: Simplify right side
    151,630.88x = 18,407,848,219.52
  5. Step 5: Solve for x
    x = 18,407,848,219.52/151,630.88
  6. Step 6: Final answer
    x = 121,399.07

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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.