Home / 109,938.80-164,908.20-103,815.20

Finding the Fourth Proportional to 109,938.80, 164,908.20 and 103,815.20

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Solution

The fourth proportional to 109,938.80, 164,908.20 and 103,815.20 is: 155,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,938.80 : 164,908.20 = 103,815.20 : x
  2. Step 2: Convert to fraction form
    109,938.80/164,908.20 = 103,815.20/x
  3. Step 3: Cross multiply
    109,938.80x = 164,908.20 × 103,815.20
  4. Step 4: Simplify right side
    109,938.80x = 17,119,977,764.64
  5. Step 5: Solve for x
    x = 17,119,977,764.64/109,938.80
  6. Step 6: Final answer
    x = 155,722.80

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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.