Home / 129,330.20-193,880.10-76,683.80

Finding the Fourth Proportional to 129,330.20, 193,880.10 and 76,683.80

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Solution

The fourth proportional to 129,330.20, 193,880.10 and 76,683.80 is: 114,957.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,330.20 : 193,880.10 = 76,683.80 : x
  2. Step 2: Convert to fraction form
    129,330.20/193,880.10 = 76,683.80/x
  3. Step 3: Cross multiply
    129,330.20x = 193,880.10 × 76,683.80
  4. Step 4: Simplify right side
    129,330.20x = 14,867,462,812.38
  5. Step 5: Solve for x
    x = 14,867,462,812.38/129,330.20
  6. Step 6: Final answer
    x = 114,957.39

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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.