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Finding the Fourth Proportional to 90,359.89, 124,699.87 and 54,542.91

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Solution

The fourth proportional to 90,359.89, 124,699.87 and 54,542.91 is: 75,271.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,359.89 : 124,699.87 = 54,542.91 : x
  2. Step 2: Convert to fraction form
    90,359.89/124,699.87 = 54,542.91/x
  3. Step 3: Cross multiply
    90,359.89x = 124,699.87 × 54,542.91
  4. Step 4: Simplify right side
    90,359.89x = 6,801,493,786.42
  5. Step 5: Solve for x
    x = 6,801,493,786.42/90,359.89
  6. Step 6: Final answer
    x = 75,271.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.