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Finding the Fourth Proportional to 35,978.20, 54,032.10 and 26,128.60

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Solution

The fourth proportional to 35,978.20, 54,032.10 and 26,128.60 is: 39,239.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,978.20 : 54,032.10 = 26,128.60 : x
  2. Step 2: Convert to fraction form
    35,978.20/54,032.10 = 26,128.60/x
  3. Step 3: Cross multiply
    35,978.20x = 54,032.10 × 26,128.60
  4. Step 4: Simplify right side
    35,978.20x = 1,411,783,128.06
  5. Step 5: Solve for x
    x = 1,411,783,128.06/35,978.20
  6. Step 6: Final answer
    x = 39,239.96

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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.