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Finding the Fourth Proportional to 81,842.60, 112,904.64 and 53,160.32

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Solution

The fourth proportional to 81,842.60, 112,904.64 and 53,160.32 is: 73,336.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,842.60 : 112,904.64 = 53,160.32 : x
  2. Step 2: Convert to fraction form
    81,842.60/112,904.64 = 53,160.32/x
  3. Step 3: Cross multiply
    81,842.60x = 112,904.64 × 53,160.32
  4. Step 4: Simplify right side
    81,842.60x = 6,002,046,791.88
  5. Step 5: Solve for x
    x = 6,002,046,791.88/81,842.60
  6. Step 6: Final answer
    x = 73,336.46

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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.