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Finding the Fourth Proportional to 171,513.48, 257,505.87 and 87,330.21

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Solution

The fourth proportional to 171,513.48, 257,505.87 and 87,330.21 is: 131,115.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,513.48 : 257,505.87 = 87,330.21 : x
  2. Step 2: Convert to fraction form
    171,513.48/257,505.87 = 87,330.21/x
  3. Step 3: Cross multiply
    171,513.48x = 257,505.87 × 87,330.21
  4. Step 4: Simplify right side
    171,513.48x = 22,488,041,703.33
  5. Step 5: Solve for x
    x = 22,488,041,703.33/171,513.48
  6. Step 6: Final answer
    x = 131,115.30

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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.