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Finding the Fourth Proportional to 128,460.20, 192,690.30 and 34,965.80

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Solution

The fourth proportional to 128,460.20, 192,690.30 and 34,965.80 is: 52,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,460.20 : 192,690.30 = 34,965.80 : x
  2. Step 2: Convert to fraction form
    128,460.20/192,690.30 = 34,965.80/x
  3. Step 3: Cross multiply
    128,460.20x = 192,690.30 × 34,965.80
  4. Step 4: Simplify right side
    128,460.20x = 6,737,570,491.74
  5. Step 5: Solve for x
    x = 6,737,570,491.74/128,460.20
  6. Step 6: Final answer
    x = 52,448.70

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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.