Home / 109,371.20-164,056.80-72,046.40

Finding the Fourth Proportional to 109,371.20, 164,056.80 and 72,046.40

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Solution

The fourth proportional to 109,371.20, 164,056.80 and 72,046.40 is: 108,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,371.20 : 164,056.80 = 72,046.40 : x
  2. Step 2: Convert to fraction form
    109,371.20/164,056.80 = 72,046.40/x
  3. Step 3: Cross multiply
    109,371.20x = 164,056.80 × 72,046.40
  4. Step 4: Simplify right side
    109,371.20x = 11,819,701,835.52
  5. Step 5: Solve for x
    x = 11,819,701,835.52/109,371.20
  6. Step 6: Final answer
    x = 108,069.60

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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.