Home / 109,619.20-164,493.60-79,962.40

Finding the Fourth Proportional to 109,619.20, 164,493.60 and 79,962.40

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Solution

The fourth proportional to 109,619.20, 164,493.60 and 79,962.40 is: 119,990.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,619.20 : 164,493.60 = 79,962.40 : x
  2. Step 2: Convert to fraction form
    109,619.20/164,493.60 = 79,962.40/x
  3. Step 3: Cross multiply
    109,619.20x = 164,493.60 × 79,962.40
  4. Step 4: Simplify right side
    109,619.20x = 13,153,303,040.64
  5. Step 5: Solve for x
    x = 13,153,303,040.64/109,619.20
  6. Step 6: Final answer
    x = 119,990.87

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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.