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Finding the Fourth Proportional to 170,879.40, 256,319.10 and 71,006.40

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Solution

The fourth proportional to 170,879.40, 256,319.10 and 71,006.40 is: 106,509.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,879.40 : 256,319.10 = 71,006.40 : x
  2. Step 2: Convert to fraction form
    170,879.40/256,319.10 = 71,006.40/x
  3. Step 3: Cross multiply
    170,879.40x = 256,319.10 × 71,006.40
  4. Step 4: Simplify right side
    170,879.40x = 18,200,296,542.24
  5. Step 5: Solve for x
    x = 18,200,296,542.24/170,879.40
  6. Step 6: Final answer
    x = 106,509.60

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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.