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Finding the Fourth Proportional to 66,538.08, 99,812.52 and 19,791

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Solution

The fourth proportional to 66,538.08, 99,812.52 and 19,791 is: 29,688.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,538.08 : 99,812.52 = 19,791 : x
  2. Step 2: Convert to fraction form
    66,538.08/99,812.52 = 19,791/x
  3. Step 3: Cross multiply
    66,538.08x = 99,812.52 × 19,791
  4. Step 4: Simplify right side
    66,538.08x = 1,975,389,583.32
  5. Step 5: Solve for x
    x = 1,975,389,583.32/66,538.08
  6. Step 6: Final answer
    x = 29,688.11

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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.