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Finding the Fourth Proportional to 89,906.40, 135,005.40 and 60,454.80

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Solution

The fourth proportional to 89,906.40, 135,005.40 and 60,454.80 is: 90,780.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,906.40 : 135,005.40 = 60,454.80 : x
  2. Step 2: Convert to fraction form
    89,906.40/135,005.40 = 60,454.80/x
  3. Step 3: Cross multiply
    89,906.40x = 135,005.40 × 60,454.80
  4. Step 4: Simplify right side
    89,906.40x = 8,161,724,455.92
  5. Step 5: Solve for x
    x = 8,161,724,455.92/89,906.40
  6. Step 6: Final answer
    x = 90,780.24

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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.