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Finding the Fourth Proportional to 64,981.44, 89,678.88 and 36,306.72

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Solution

The fourth proportional to 64,981.44, 89,678.88 and 36,306.72 is: 50,105.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,981.44 : 89,678.88 = 36,306.72 : x
  2. Step 2: Convert to fraction form
    64,981.44/89,678.88 = 36,306.72/x
  3. Step 3: Cross multiply
    64,981.44x = 89,678.88 × 36,306.72
  4. Step 4: Simplify right side
    64,981.44x = 3,255,945,986.07
  5. Step 5: Solve for x
    x = 3,255,945,986.07/64,981.44
  6. Step 6: Final answer
    x = 50,105.78

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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.