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Finding the Fourth Proportional to 64,766.70, 89,376.30 and 36,471.78

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Solution

The fourth proportional to 64,766.70, 89,376.30 and 36,471.78 is: 50,330.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,766.70 : 89,376.30 = 36,471.78 : x
  2. Step 2: Convert to fraction form
    64,766.70/89,376.30 = 36,471.78/x
  3. Step 3: Cross multiply
    64,766.70x = 89,376.30 × 36,471.78
  4. Step 4: Simplify right side
    64,766.70x = 3,259,712,750.81
  5. Step 5: Solve for x
    x = 3,259,712,750.81/64,766.70
  6. Step 6: Final answer
    x = 50,330.07

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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.