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Finding the Fourth Proportional to 64,787.76, 89,405.28 and 36,492.80

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Solution

The fourth proportional to 64,787.76, 89,405.28 and 36,492.80 is: 50,359.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,787.76 : 89,405.28 = 36,492.80 : x
  2. Step 2: Convert to fraction form
    64,787.76/89,405.28 = 36,492.80/x
  3. Step 3: Cross multiply
    64,787.76x = 89,405.28 × 36,492.80
  4. Step 4: Simplify right side
    64,787.76x = 3,262,649,001.98
  5. Step 5: Solve for x
    x = 3,262,649,001.98/64,787.76
  6. Step 6: Final answer
    x = 50,359.03

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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.