Home / 109,619.20-164,428.80-105,990.40

Finding the Fourth Proportional to 109,619.20, 164,428.80 and 105,990.40

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Solution

The fourth proportional to 109,619.20, 164,428.80 and 105,990.40 is: 158,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,619.20 : 164,428.80 = 105,990.40 : x
  2. Step 2: Convert to fraction form
    109,619.20/164,428.80 = 105,990.40/x
  3. Step 3: Cross multiply
    109,619.20x = 164,428.80 × 105,990.40
  4. Step 4: Simplify right side
    109,619.20x = 17,427,874,283.52
  5. Step 5: Solve for x
    x = 17,427,874,283.52/109,619.20
  6. Step 6: Final answer
    x = 158,985.60

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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.