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Finding the Fourth Proportional to 60,580.92, 90,871.44 and 21,128.52

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Solution

The fourth proportional to 60,580.92, 90,871.44 and 21,128.52 is: 31,692.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,580.92 : 90,871.44 = 21,128.52 : x
  2. Step 2: Convert to fraction form
    60,580.92/90,871.44 = 21,128.52/x
  3. Step 3: Cross multiply
    60,580.92x = 90,871.44 × 21,128.52
  4. Step 4: Simplify right side
    60,580.92x = 1,919,979,037.47
  5. Step 5: Solve for x
    x = 1,919,979,037.47/60,580.92
  6. Step 6: Final answer
    x = 31,692.80

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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.