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Finding the Fourth Proportional to 272,634, 409,034.40 and 139,608.39

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Solution

The fourth proportional to 272,634, 409,034.40 and 139,608.39 is: 209,455.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,634 : 409,034.40 = 139,608.39 : x
  2. Step 2: Convert to fraction form
    272,634/409,034.40 = 139,608.39/x
  3. Step 3: Cross multiply
    272,634x = 409,034.40 × 139,608.39
  4. Step 4: Simplify right side
    272,634x = 57,104,634,038.62
  5. Step 5: Solve for x
    x = 57,104,634,038.62/272,634
  6. Step 6: Final answer
    x = 209,455.29

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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.