Home / 85,623.57-128,493.77-30,219.57

Finding the Fourth Proportional to 85,623.57, 128,493.77 and 30,219.57

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Solution

The fourth proportional to 85,623.57, 128,493.77 and 30,219.57 is: 45,349.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,623.57 : 128,493.77 = 30,219.57 : x
  2. Step 2: Convert to fraction form
    85,623.57/128,493.77 = 30,219.57/x
  3. Step 3: Cross multiply
    85,623.57x = 128,493.77 × 30,219.57
  4. Step 4: Simplify right side
    85,623.57x = 3,883,026,325.98
  5. Step 5: Solve for x
    x = 3,883,026,325.98/85,623.57
  6. Step 6: Final answer
    x = 45,349.97

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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.