Home / 109,811.60-164,717.40-90,112.40

Finding the Fourth Proportional to 109,811.60, 164,717.40 and 90,112.40

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Solution

The fourth proportional to 109,811.60, 164,717.40 and 90,112.40 is: 135,168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,811.60 : 164,717.40 = 90,112.40 : x
  2. Step 2: Convert to fraction form
    109,811.60/164,717.40 = 90,112.40/x
  3. Step 3: Cross multiply
    109,811.60x = 164,717.40 × 90,112.40
  4. Step 4: Simplify right side
    109,811.60x = 14,843,080,235.76
  5. Step 5: Solve for x
    x = 14,843,080,235.76/109,811.60
  6. Step 6: Final answer
    x = 135,168.60

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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.