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Finding the Fourth Proportional to 81,857.92, 122,685.84 and 42,392.32

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Solution

The fourth proportional to 81,857.92, 122,685.84 and 42,392.32 is: 63,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,857.92 : 122,685.84 = 42,392.32 : x
  2. Step 2: Convert to fraction form
    81,857.92/122,685.84 = 42,392.32/x
  3. Step 3: Cross multiply
    81,857.92x = 122,685.84 × 42,392.32
  4. Step 4: Simplify right side
    81,857.92x = 5,200,937,388.75
  5. Step 5: Solve for x
    x = 5,200,937,388.75/81,857.92
  6. Step 6: Final answer
    x = 63,536.15

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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.