Home / 109,970.20-164,955.30-100,128.70

Finding the Fourth Proportional to 109,970.20, 164,955.30 and 100,128.70

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Solution

The fourth proportional to 109,970.20, 164,955.30 and 100,128.70 is: 150,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,970.20 : 164,955.30 = 100,128.70 : x
  2. Step 2: Convert to fraction form
    109,970.20/164,955.30 = 100,128.70/x
  3. Step 3: Cross multiply
    109,970.20x = 164,955.30 × 100,128.70
  4. Step 4: Simplify right side
    109,970.20x = 16,516,759,747.11
  5. Step 5: Solve for x
    x = 16,516,759,747.11/109,970.20
  6. Step 6: Final answer
    x = 150,193.05

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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.