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Finding the Fourth Proportional to 60,485.70, 90,765.03 and 21,070.49

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Solution

The fourth proportional to 60,485.70, 90,765.03 and 21,070.49 is: 31,618.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,485.70 : 90,765.03 = 21,070.49 : x
  2. Step 2: Convert to fraction form
    60,485.70/90,765.03 = 21,070.49/x
  3. Step 3: Cross multiply
    60,485.70x = 90,765.03 × 21,070.49
  4. Step 4: Simplify right side
    60,485.70x = 1,912,463,656.96
  5. Step 5: Solve for x
    x = 1,912,463,656.96/60,485.70
  6. Step 6: Final answer
    x = 31,618.44

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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.