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Finding the Fourth Proportional to 64,679.70, 89,257.86 and 36,385.40

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Solution

The fourth proportional to 64,679.70, 89,257.86 and 36,385.40 is: 50,211.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,679.70 : 89,257.86 = 36,385.40 : x
  2. Step 2: Convert to fraction form
    64,679.70/89,257.86 = 36,385.40/x
  3. Step 3: Cross multiply
    64,679.70x = 89,257.86 × 36,385.40
  4. Step 4: Simplify right side
    64,679.70x = 3,247,682,492.95
  5. Step 5: Solve for x
    x = 3,247,682,492.95/64,679.70
  6. Step 6: Final answer
    x = 50,211.77

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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.