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Finding the Fourth Proportional to 60,485.98, 90,718.70 and 18,355.90

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Solution

The fourth proportional to 60,485.98, 90,718.70 and 18,355.90 is: 27,530.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,485.98 : 90,718.70 = 18,355.90 : x
  2. Step 2: Convert to fraction form
    60,485.98/90,718.70 = 18,355.90/x
  3. Step 3: Cross multiply
    60,485.98x = 90,718.70 × 18,355.90
  4. Step 4: Simplify right side
    60,485.98x = 1,665,223,385.33
  5. Step 5: Solve for x
    x = 1,665,223,385.33/60,485.98
  6. Step 6: Final answer
    x = 27,530.73

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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.