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Finding the Fourth Proportional to 171,645.40, 257,487.30 and 53,315.80

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Solution

The fourth proportional to 171,645.40, 257,487.30 and 53,315.80 is: 79,979.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,645.40 : 257,487.30 = 53,315.80 : x
  2. Step 2: Convert to fraction form
    171,645.40/257,487.30 = 53,315.80/x
  3. Step 3: Cross multiply
    171,645.40x = 257,487.30 × 53,315.80
  4. Step 4: Simplify right side
    171,645.40x = 13,728,141,389.34
  5. Step 5: Solve for x
    x = 13,728,141,389.34/171,645.40
  6. Step 6: Final answer
    x = 79,979.66

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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.