Home / 109,868.20-164,802.30-90,185.20

Finding the Fourth Proportional to 109,868.20, 164,802.30 and 90,185.20

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Solution

The fourth proportional to 109,868.20, 164,802.30 and 90,185.20 is: 135,277.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,868.20 : 164,802.30 = 90,185.20 : x
  2. Step 2: Convert to fraction form
    109,868.20/164,802.30 = 90,185.20/x
  3. Step 3: Cross multiply
    109,868.20x = 164,802.30 × 90,185.20
  4. Step 4: Simplify right side
    109,868.20x = 14,862,728,385.96
  5. Step 5: Solve for x
    x = 14,862,728,385.96/109,868.20
  6. Step 6: Final answer
    x = 135,277.80

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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.