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Finding the Fourth Proportional to 170,745.30, 256,117.95 and 120,881.70

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Solution

The fourth proportional to 170,745.30, 256,117.95 and 120,881.70 is: 181,322.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,745.30 : 256,117.95 = 120,881.70 : x
  2. Step 2: Convert to fraction form
    170,745.30/256,117.95 = 120,881.70/x
  3. Step 3: Cross multiply
    170,745.30x = 256,117.95 × 120,881.70
  4. Step 4: Simplify right side
    170,745.30x = 30,959,973,196.52
  5. Step 5: Solve for x
    x = 30,959,973,196.52/170,745.30
  6. Step 6: Final answer
    x = 181,322.55

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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.