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Finding the Fourth Proportional to 66,527.20, 99,805.20 and 19,784.80

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Solution

The fourth proportional to 66,527.20, 99,805.20 and 19,784.80 is: 29,681.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,527.20 : 99,805.20 = 19,784.80 : x
  2. Step 2: Convert to fraction form
    66,527.20/99,805.20 = 19,784.80/x
  3. Step 3: Cross multiply
    66,527.20x = 99,805.20 × 19,784.80
  4. Step 4: Simplify right side
    66,527.20x = 1,974,625,920.96
  5. Step 5: Solve for x
    x = 1,974,625,920.96/66,527.20
  6. Step 6: Final answer
    x = 29,681.48

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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.