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Finding the Fourth Proportional to 60,403.80, 90,605.70 and 35,455.80

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Solution

The fourth proportional to 60,403.80, 90,605.70 and 35,455.80 is: 53,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,403.80 : 90,605.70 = 35,455.80 : x
  2. Step 2: Convert to fraction form
    60,403.80/90,605.70 = 35,455.80/x
  3. Step 3: Cross multiply
    60,403.80x = 90,605.70 × 35,455.80
  4. Step 4: Simplify right side
    60,403.80x = 3,212,497,578.06
  5. Step 5: Solve for x
    x = 3,212,497,578.06/60,403.80
  6. Step 6: Final answer
    x = 53,183.70

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1.5x scale

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.