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Finding the Fourth Proportional to 90,300.91, 124,616.19 and 54,484

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Solution

The fourth proportional to 90,300.91, 124,616.19 and 54,484 is: 75,188.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,300.91 : 124,616.19 = 54,484 : x
  2. Step 2: Convert to fraction form
    90,300.91/124,616.19 = 54,484/x
  3. Step 3: Cross multiply
    90,300.91x = 124,616.19 × 54,484
  4. Step 4: Simplify right side
    90,300.91x = 6,789,588,495.96
  5. Step 5: Solve for x
    x = 6,789,588,495.96/90,300.91
  6. Step 6: Final answer
    x = 75,188.48

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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.