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Finding the Fourth Proportional to 72,643.33, 100,207.32 and 67,505.84

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Solution

The fourth proportional to 72,643.33, 100,207.32 and 67,505.84 is: 93,120.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,643.33 : 100,207.32 = 67,505.84 : x
  2. Step 2: Convert to fraction form
    72,643.33/100,207.32 = 67,505.84/x
  3. Step 3: Cross multiply
    72,643.33x = 100,207.32 × 67,505.84
  4. Step 4: Simplify right side
    72,643.33x = 6,764,578,809.71
  5. Step 5: Solve for x
    x = 6,764,578,809.71/72,643.33
  6. Step 6: Final answer
    x = 93,120.44

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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.