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Finding the Fourth Proportional to 90,738.40, 136,107.60 and 62,744.80

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Solution

The fourth proportional to 90,738.40, 136,107.60 and 62,744.80 is: 94,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,738.40 : 136,107.60 = 62,744.80 : x
  2. Step 2: Convert to fraction form
    90,738.40/136,107.60 = 62,744.80/x
  3. Step 3: Cross multiply
    90,738.40x = 136,107.60 × 62,744.80
  4. Step 4: Simplify right side
    90,738.40x = 8,540,044,140.48
  5. Step 5: Solve for x
    x = 8,540,044,140.48/90,738.40
  6. Step 6: Final answer
    x = 94,117.20

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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.