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Finding the Fourth Proportional to 73,409.76, 101,247.84 and 64,920.96

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Solution

The fourth proportional to 73,409.76, 101,247.84 and 64,920.96 is: 89,539.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,409.76 : 101,247.84 = 64,920.96 : x
  2. Step 2: Convert to fraction form
    73,409.76/101,247.84 = 64,920.96/x
  3. Step 3: Cross multiply
    73,409.76x = 101,247.84 × 64,920.96
  4. Step 4: Simplify right side
    73,409.76x = 6,573,106,970.73
  5. Step 5: Solve for x
    x = 6,573,106,970.73/73,409.76
  6. Step 6: Final answer
    x = 89,539.96

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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.