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Finding the Fourth Proportional to 85,403.45, 128,035.94 and 35,520.89

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Solution

The fourth proportional to 85,403.45, 128,035.94 and 35,520.89 is: 53,252.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.45 : 128,035.94 = 35,520.89 : x
  2. Step 2: Convert to fraction form
    85,403.45/128,035.94 = 35,520.89/x
  3. Step 3: Cross multiply
    85,403.45x = 128,035.94 × 35,520.89
  4. Step 4: Simplify right side
    85,403.45x = 4,547,950,451.98
  5. Step 5: Solve for x
    x = 4,547,950,451.98/85,403.45
  6. Step 6: Final answer
    x = 53,252.54

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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.