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Finding the Fourth Proportional to 61,242.68, 91,867.46 and 19,128.58

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Solution

The fourth proportional to 61,242.68, 91,867.46 and 19,128.58 is: 28,693.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,242.68 : 91,867.46 = 19,128.58 : x
  2. Step 2: Convert to fraction form
    61,242.68/91,867.46 = 19,128.58/x
  3. Step 3: Cross multiply
    61,242.68x = 91,867.46 × 19,128.58
  4. Step 4: Simplify right side
    61,242.68x = 1,757,294,058.01
  5. Step 5: Solve for x
    x = 1,757,294,058.01/61,242.68
  6. Step 6: Final answer
    x = 28,693.94

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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.