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Finding the Fourth Proportional to 218,949.40, 328,424.10 and 100,851.40

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Solution

The fourth proportional to 218,949.40, 328,424.10 and 100,851.40 is: 151,277.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,949.40 : 328,424.10 = 100,851.40 : x
  2. Step 2: Convert to fraction form
    218,949.40/328,424.10 = 100,851.40/x
  3. Step 3: Cross multiply
    218,949.40x = 328,424.10 × 100,851.40
  4. Step 4: Simplify right side
    218,949.40x = 33,122,030,278.74
  5. Step 5: Solve for x
    x = 33,122,030,278.74/218,949.40
  6. Step 6: Final answer
    x = 151,277.10

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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.