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Finding the Fourth Proportional to 170,148.81, 255,381.10 and 85,968.11

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Solution

The fourth proportional to 170,148.81, 255,381.10 and 85,968.11 is: 129,031.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,148.81 : 255,381.10 = 85,968.11 : x
  2. Step 2: Convert to fraction form
    170,148.81/255,381.10 = 85,968.11/x
  3. Step 3: Cross multiply
    170,148.81x = 255,381.10 × 85,968.11
  4. Step 4: Simplify right side
    170,148.81x = 21,954,630,496.72
  5. Step 5: Solve for x
    x = 21,954,630,496.72/170,148.81
  6. Step 6: Final answer
    x = 129,031.94

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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.