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Finding the Fourth Proportional to 60,572.20, 90,825.90 and 21,130.60

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Solution

The fourth proportional to 60,572.20, 90,825.90 and 21,130.60 is: 31,684.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,572.20 : 90,825.90 = 21,130.60 : x
  2. Step 2: Convert to fraction form
    60,572.20/90,825.90 = 21,130.60/x
  3. Step 3: Cross multiply
    60,572.20x = 90,825.90 × 21,130.60
  4. Step 4: Simplify right side
    60,572.20x = 1,919,205,762.54
  5. Step 5: Solve for x
    x = 1,919,205,762.54/60,572.20
  6. Step 6: Final answer
    x = 31,684.60

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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.