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Finding the Fourth Proportional to 170,100.07, 255,307.72 and 85,919.24

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Solution

The fourth proportional to 170,100.07, 255,307.72 and 85,919.24 is: 128,958.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,100.07 : 255,307.72 = 85,919.24 : x
  2. Step 2: Convert to fraction form
    170,100.07/255,307.72 = 85,919.24/x
  3. Step 3: Cross multiply
    170,100.07x = 255,307.72 × 85,919.24
  4. Step 4: Simplify right side
    170,100.07x = 21,935,843,562.40
  5. Step 5: Solve for x
    x = 21,935,843,562.40/170,100.07
  6. Step 6: Final answer
    x = 128,958.47

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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.