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Finding the Fourth Proportional to 81,657.60, 112,659.84 and 51,866.88

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Solution

The fourth proportional to 81,657.60, 112,659.84 and 51,866.88 is: 71,558.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,657.60 : 112,659.84 = 51,866.88 : x
  2. Step 2: Convert to fraction form
    81,657.60/112,659.84 = 51,866.88/x
  3. Step 3: Cross multiply
    81,657.60x = 112,659.84 × 51,866.88
  4. Step 4: Simplify right side
    81,657.60x = 5,843,314,402.10
  5. Step 5: Solve for x
    x = 5,843,314,402.10/81,657.60
  6. Step 6: Final answer
    x = 71,558.73

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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.