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Finding the Fourth Proportional to 218,762.10, 327,487.05 and 129,969.90

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Solution

The fourth proportional to 218,762.10, 327,487.05 and 129,969.90 is: 194,565.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,762.10 : 327,487.05 = 129,969.90 : x
  2. Step 2: Convert to fraction form
    218,762.10/327,487.05 = 129,969.90/x
  3. Step 3: Cross multiply
    218,762.10x = 327,487.05 × 129,969.90
  4. Step 4: Simplify right side
    218,762.10x = 42,563,459,139.80
  5. Step 5: Solve for x
    x = 42,563,459,139.80/218,762.10
  6. Step 6: Final answer
    x = 194,565.05

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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.