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Finding the Fourth Proportional to 85,953.60, 128,852.64 and 30,536.64

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Solution

The fourth proportional to 85,953.60, 128,852.64 and 30,536.64 is: 45,777.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,953.60 : 128,852.64 = 30,536.64 : x
  2. Step 2: Convert to fraction form
    85,953.60/128,852.64 = 30,536.64/x
  3. Step 3: Cross multiply
    85,953.60x = 128,852.64 × 30,536.64
  4. Step 4: Simplify right side
    85,953.60x = 3,934,726,680.73
  5. Step 5: Solve for x
    x = 3,934,726,680.73/85,953.60
  6. Step 6: Final answer
    x = 45,777.33

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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.