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Finding the Fourth Proportional to 171,911.72, 257,967.98 and 72,064.24

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Solution

The fourth proportional to 171,911.72, 257,967.98 and 72,064.24 is: 108,138.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,911.72 : 257,967.98 = 72,064.24 : x
  2. Step 2: Convert to fraction form
    171,911.72/257,967.98 = 72,064.24/x
  3. Step 3: Cross multiply
    171,911.72x = 257,967.98 × 72,064.24
  4. Step 4: Simplify right side
    171,911.72x = 18,590,266,423.04
  5. Step 5: Solve for x
    x = 18,590,266,423.04/171,911.72
  6. Step 6: Final answer
    x = 108,138.45

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1.5x scale

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.