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Finding the Fourth Proportional to 66,364.52, 99,561.18 and 19,621.16

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Solution

The fourth proportional to 66,364.52, 99,561.18 and 19,621.16 is: 29,436.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,364.52 : 99,561.18 = 19,621.16 : x
  2. Step 2: Convert to fraction form
    66,364.52/99,561.18 = 19,621.16/x
  3. Step 3: Cross multiply
    66,364.52x = 99,561.18 × 19,621.16
  4. Step 4: Simplify right side
    66,364.52x = 1,953,505,842.57
  5. Step 5: Solve for x
    x = 1,953,505,842.57/66,364.52
  6. Step 6: Final answer
    x = 29,436.00

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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.