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Finding the Fourth Proportional to 66,821.59, 100,125.76 and 48,969.51

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Solution

The fourth proportional to 66,821.59, 100,125.76 and 48,969.51 is: 73,376.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,821.59 : 100,125.76 = 48,969.51 : x
  2. Step 2: Convert to fraction form
    66,821.59/100,125.76 = 48,969.51/x
  3. Step 3: Cross multiply
    66,821.59x = 100,125.76 × 48,969.51
  4. Step 4: Simplify right side
    66,821.59x = 4,903,109,405.58
  5. Step 5: Solve for x
    x = 4,903,109,405.58/66,821.59
  6. Step 6: Final answer
    x = 73,376.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.