Home / 268,212.10-402,318.15-81,223.60

Finding the Fourth Proportional to 268,212.10, 402,318.15 and 81,223.60

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Solution

The fourth proportional to 268,212.10, 402,318.15 and 81,223.60 is: 121,835.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,212.10 : 402,318.15 = 81,223.60 : x
  2. Step 2: Convert to fraction form
    268,212.10/402,318.15 = 81,223.60/x
  3. Step 3: Cross multiply
    268,212.10x = 402,318.15 × 81,223.60
  4. Step 4: Simplify right side
    268,212.10x = 32,677,728,488.34
  5. Step 5: Solve for x
    x = 32,677,728,488.34/268,212.10
  6. Step 6: Final answer
    x = 121,835.40

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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.