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Finding the Fourth Proportional to 171,424.60, 257,282.70 and 76,800.40

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Solution

The fourth proportional to 171,424.60, 257,282.70 and 76,800.40 is: 115,265.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,424.60 : 257,282.70 = 76,800.40 : x
  2. Step 2: Convert to fraction form
    171,424.60/257,282.70 = 76,800.40/x
  3. Step 3: Cross multiply
    171,424.60x = 257,282.70 × 76,800.40
  4. Step 4: Simplify right side
    171,424.60x = 19,759,414,273.08
  5. Step 5: Solve for x
    x = 19,759,414,273.08/171,424.60
  6. Step 6: Final answer
    x = 115,265.92

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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.