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Finding the Fourth Proportional to 170,453.20, 255,679.80 and 128,981.20

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Solution

The fourth proportional to 170,453.20, 255,679.80 and 128,981.20 is: 193,471.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,453.20 : 255,679.80 = 128,981.20 : x
  2. Step 2: Convert to fraction form
    170,453.20/255,679.80 = 128,981.20/x
  3. Step 3: Cross multiply
    170,453.20x = 255,679.80 × 128,981.20
  4. Step 4: Simplify right side
    170,453.20x = 32,977,887,419.76
  5. Step 5: Solve for x
    x = 32,977,887,419.76/170,453.20
  6. Step 6: Final answer
    x = 193,471.80

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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.