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Finding the Fourth Proportional to 90,100.20, 124,345.92 and 52,372

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Solution

The fourth proportional to 90,100.20, 124,345.92 and 52,372 is: 72,277.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,100.20 : 124,345.92 = 52,372 : x
  2. Step 2: Convert to fraction form
    90,100.20/124,345.92 = 52,372/x
  3. Step 3: Cross multiply
    90,100.20x = 124,345.92 × 52,372
  4. Step 4: Simplify right side
    90,100.20x = 6,512,244,522.24
  5. Step 5: Solve for x
    x = 6,512,244,522.24/90,100.20
  6. Step 6: Final answer
    x = 72,277.80

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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.