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Finding the Fourth Proportional to 66,281.77, 99,422.65 and 54,570.38

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Solution

The fourth proportional to 66,281.77, 99,422.65 and 54,570.38 is: 81,855.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,281.77 : 99,422.65 = 54,570.38 : x
  2. Step 2: Convert to fraction form
    66,281.77/99,422.65 = 54,570.38/x
  3. Step 3: Cross multiply
    66,281.77x = 99,422.65 × 54,570.38
  4. Step 4: Simplify right side
    66,281.77x = 5,425,531,791.11
  5. Step 5: Solve for x
    x = 5,425,531,791.11/66,281.77
  6. Step 6: Final answer
    x = 81,855.57

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1.5x scale

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.