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Finding the Fourth Proportional to 85,601.92, 128,356.48 and 47,662.88

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Solution

The fourth proportional to 85,601.92, 128,356.48 and 47,662.88 is: 71,468.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,601.92 : 128,356.48 = 47,662.88 : x
  2. Step 2: Convert to fraction form
    85,601.92/128,356.48 = 47,662.88/x
  3. Step 3: Cross multiply
    85,601.92x = 128,356.48 × 47,662.88
  4. Step 4: Simplify right side
    85,601.92x = 6,117,839,503.46
  5. Step 5: Solve for x
    x = 6,117,839,503.46/85,601.92
  6. Step 6: Final answer
    x = 71,468.48

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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.