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Finding the Fourth Proportional to 452,423.96, 678,668.60 and 136,905.72

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Solution

The fourth proportional to 452,423.96, 678,668.60 and 136,905.72 is: 205,368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,423.96 : 678,668.60 = 136,905.72 : x
  2. Step 2: Convert to fraction form
    452,423.96/678,668.60 = 136,905.72/x
  3. Step 3: Cross multiply
    452,423.96x = 678,668.60 × 136,905.72
  4. Step 4: Simplify right side
    452,423.96x = 92,913,613,324.39
  5. Step 5: Solve for x
    x = 92,913,613,324.39/452,423.96
  6. Step 6: Final answer
    x = 205,368.46

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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.