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Finding the Fourth Proportional to 170,440.80, 255,658.80 and 76,946.40

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Solution

The fourth proportional to 170,440.80, 255,658.80 and 76,946.40 is: 115,418.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,440.80 : 255,658.80 = 76,946.40 : x
  2. Step 2: Convert to fraction form
    170,440.80/255,658.80 = 76,946.40/x
  3. Step 3: Cross multiply
    170,440.80x = 255,658.80 × 76,946.40
  4. Step 4: Simplify right side
    170,440.80x = 19,672,024,288.32
  5. Step 5: Solve for x
    x = 19,672,024,288.32/170,440.80
  6. Step 6: Final answer
    x = 115,418.52

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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.