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Finding the Fourth Proportional to 323,890.74, 485,781.03 and 87,180.66

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Solution

The fourth proportional to 323,890.74, 485,781.03 and 87,180.66 is: 130,756.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,890.74 : 485,781.03 = 87,180.66 : x
  2. Step 2: Convert to fraction form
    323,890.74/485,781.03 = 87,180.66/x
  3. Step 3: Cross multiply
    323,890.74x = 485,781.03 × 87,180.66
  4. Step 4: Simplify right side
    323,890.74x = 42,350,710,810.88
  5. Step 5: Solve for x
    x = 42,350,710,810.88/323,890.74
  6. Step 6: Final answer
    x = 130,756.16

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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.