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Finding the Fourth Proportional to 60,485.95, 90,765.41 and 21,070.74

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Solution

The fourth proportional to 60,485.95, 90,765.41 and 21,070.74 is: 31,618.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,485.95 : 90,765.41 = 21,070.74 : x
  2. Step 2: Convert to fraction form
    60,485.95/90,765.41 = 21,070.74/x
  3. Step 3: Cross multiply
    60,485.95x = 90,765.41 × 21,070.74
  4. Step 4: Simplify right side
    60,485.95x = 1,912,494,249.75
  5. Step 5: Solve for x
    x = 1,912,494,249.75/60,485.95
  6. Step 6: Final answer
    x = 31,618.82

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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.