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Finding the Fourth Proportional to 170,655.40, 255,656.70 and 91,743.40

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Solution

The fourth proportional to 170,655.40, 255,656.70 and 91,743.40 is: 137,439.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,655.40 : 255,656.70 = 91,743.40 : x
  2. Step 2: Convert to fraction form
    170,655.40/255,656.70 = 91,743.40/x
  3. Step 3: Cross multiply
    170,655.40x = 255,656.70 × 91,743.40
  4. Step 4: Simplify right side
    170,655.40x = 23,454,814,890.78
  5. Step 5: Solve for x
    x = 23,454,814,890.78/170,655.40
  6. Step 6: Final answer
    x = 137,439.63

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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.