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Finding the Fourth Proportional to 61,059.13, 91,601.80 and 18,938.32

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Solution

The fourth proportional to 61,059.13, 91,601.80 and 18,938.32 is: 28,411.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,059.13 : 91,601.80 = 18,938.32 : x
  2. Step 2: Convert to fraction form
    61,059.13/91,601.80 = 18,938.32/x
  3. Step 3: Cross multiply
    61,059.13x = 91,601.80 × 18,938.32
  4. Step 4: Simplify right side
    61,059.13x = 1,734,783,924.63
  5. Step 5: Solve for x
    x = 1,734,783,924.63/61,059.13
  6. Step 6: Final answer
    x = 28,411.54

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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.