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Finding the Fourth Proportional to 85,852.37, 128,796.96 and 28,931.88

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Solution

The fourth proportional to 85,852.37, 128,796.96 and 28,931.88 is: 43,404.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,852.37 : 128,796.96 = 28,931.88 : x
  2. Step 2: Convert to fraction form
    85,852.37/128,796.96 = 28,931.88/x
  3. Step 3: Cross multiply
    85,852.37x = 128,796.96 × 28,931.88
  4. Step 4: Simplify right side
    85,852.37x = 3,726,338,191.08
  5. Step 5: Solve for x
    x = 3,726,338,191.08/85,852.37
  6. Step 6: Final answer
    x = 43,404.02

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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.