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Finding the Fourth Proportional to 171,459.40, 257,189.10 and 71,586.40

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Solution

The fourth proportional to 171,459.40, 257,189.10 and 71,586.40 is: 107,379.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,459.40 : 257,189.10 = 71,586.40 : x
  2. Step 2: Convert to fraction form
    171,459.40/257,189.10 = 71,586.40/x
  3. Step 3: Cross multiply
    171,459.40x = 257,189.10 × 71,586.40
  4. Step 4: Simplify right side
    171,459.40x = 18,411,241,788.24
  5. Step 5: Solve for x
    x = 18,411,241,788.24/171,459.40
  6. Step 6: Final answer
    x = 107,379.60

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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.