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Finding the Fourth Proportional to 257,699.16, 386,660.02 and 139,453.96

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Solution

The fourth proportional to 257,699.16, 386,660.02 and 139,453.96 is: 209,241.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,699.16 : 386,660.02 = 139,453.96 : x
  2. Step 2: Convert to fraction form
    257,699.16/386,660.02 = 139,453.96/x
  3. Step 3: Cross multiply
    257,699.16x = 386,660.02 × 139,453.96
  4. Step 4: Simplify right side
    257,699.16x = 53,921,270,962.68
  5. Step 5: Solve for x
    x = 53,921,270,962.68/257,699.16
  6. Step 6: Final answer
    x = 209,241.16

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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.