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Finding the Fourth Proportional to 257,860.76, 386,525.06 and 108,187.96

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Solution

The fourth proportional to 257,860.76, 386,525.06 and 108,187.96 is: 162,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,860.76 : 386,525.06 = 108,187.96 : x
  2. Step 2: Convert to fraction form
    257,860.76/386,525.06 = 108,187.96/x
  3. Step 3: Cross multiply
    257,860.76x = 386,525.06 × 108,187.96
  4. Step 4: Simplify right side
    257,860.76x = 41,817,357,730.28
  5. Step 5: Solve for x
    x = 41,817,357,730.28/257,860.76
  6. Step 6: Final answer
    x = 162,170.30

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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.