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Finding the Fourth Proportional to 257,485.42, 386,154.42 and 88,961.68

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Solution

The fourth proportional to 257,485.42, 386,154.42 and 88,961.68 is: 133,417.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,485.42 : 386,154.42 = 88,961.68 : x
  2. Step 2: Convert to fraction form
    257,485.42/386,154.42 = 88,961.68/x
  3. Step 3: Cross multiply
    257,485.42x = 386,154.42 × 88,961.68
  4. Step 4: Simplify right side
    257,485.42x = 34,352,945,942.63
  5. Step 5: Solve for x
    x = 34,352,945,942.63/257,485.42
  6. Step 6: Final answer
    x = 133,417.05

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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.