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Finding the Fourth Proportional to 218,802.40, 328,203.50 and 69,057.70

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Solution

The fourth proportional to 218,802.40, 328,203.50 and 69,057.70 is: 103,586.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,802.40 : 328,203.50 = 69,057.70 : x
  2. Step 2: Convert to fraction form
    218,802.40/328,203.50 = 69,057.70/x
  3. Step 3: Cross multiply
    218,802.40x = 328,203.50 × 69,057.70
  4. Step 4: Simplify right side
    218,802.40x = 22,664,977,676.15
  5. Step 5: Solve for x
    x = 22,664,977,676.15/218,802.40
  6. Step 6: Final answer
    x = 103,586.51

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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.