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Finding the Fourth Proportional to 60,580.20, 90,837.90 and 21,138.60

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Solution

The fourth proportional to 60,580.20, 90,837.90 and 21,138.60 is: 31,696.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,580.20 : 90,837.90 = 21,138.60 : x
  2. Step 2: Convert to fraction form
    60,580.20/90,837.90 = 21,138.60/x
  3. Step 3: Cross multiply
    60,580.20x = 90,837.90 × 21,138.60
  4. Step 4: Simplify right side
    60,580.20x = 1,920,186,032.94
  5. Step 5: Solve for x
    x = 1,920,186,032.94/60,580.20
  6. Step 6: Final answer
    x = 31,696.59

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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.