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Finding the Fourth Proportional to 205,581.20, 308,360.76 and 65,328.90

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Solution

The fourth proportional to 205,581.20, 308,360.76 and 65,328.90 is: 97,989.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,581.20 : 308,360.76 = 65,328.90 : x
  2. Step 2: Convert to fraction form
    205,581.20/308,360.76 = 65,328.90/x
  3. Step 3: Cross multiply
    205,581.20x = 308,360.76 × 65,328.90
  4. Step 4: Simplify right side
    205,581.20x = 20,144,869,253.96
  5. Step 5: Solve for x
    x = 20,144,869,253.96/205,581.20
  6. Step 6: Final answer
    x = 97,989.84

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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.