Home / 109,867.20-164,800.80-72,931.20

Finding the Fourth Proportional to 109,867.20, 164,800.80 and 72,931.20

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Solution

The fourth proportional to 109,867.20, 164,800.80 and 72,931.20 is: 109,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,867.20 : 164,800.80 = 72,931.20 : x
  2. Step 2: Convert to fraction form
    109,867.20/164,800.80 = 72,931.20/x
  3. Step 3: Cross multiply
    109,867.20x = 164,800.80 × 72,931.20
  4. Step 4: Simplify right side
    109,867.20x = 12,019,120,104.96
  5. Step 5: Solve for x
    x = 12,019,120,104.96/109,867.20
  6. Step 6: Final answer
    x = 109,396.80

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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.