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Finding the Fourth Proportional to 81,416.61, 112,409.82 and 50,836.32

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Solution

The fourth proportional to 81,416.61, 112,409.82 and 50,836.32 is: 70,188.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,416.61 : 112,409.82 = 50,836.32 : x
  2. Step 2: Convert to fraction form
    81,416.61/112,409.82 = 50,836.32/x
  3. Step 3: Cross multiply
    81,416.61x = 112,409.82 × 50,836.32
  4. Step 4: Simplify right side
    81,416.61x = 5,714,501,580.66
  5. Step 5: Solve for x
    x = 5,714,501,580.66/81,416.61
  6. Step 6: Final answer
    x = 70,188.40

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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.