Home / 204,624.80-306,937.20-86,429.60

Finding the Fourth Proportional to 204,624.80, 306,937.20 and 86,429.60

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Solution

The fourth proportional to 204,624.80, 306,937.20 and 86,429.60 is: 129,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,624.80 : 306,937.20 = 86,429.60 : x
  2. Step 2: Convert to fraction form
    204,624.80/306,937.20 = 86,429.60/x
  3. Step 3: Cross multiply
    204,624.80x = 306,937.20 × 86,429.60
  4. Step 4: Simplify right side
    204,624.80x = 26,528,459,421.12
  5. Step 5: Solve for x
    x = 26,528,459,421.12/204,624.80
  6. Step 6: Final answer
    x = 129,644.40

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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.