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Finding the Fourth Proportional to 66,953.61, 99,868.41 and 61,513.38

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Solution

The fourth proportional to 66,953.61, 99,868.41 and 61,513.38 is: 91,753.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,953.61 : 99,868.41 = 61,513.38 : x
  2. Step 2: Convert to fraction form
    66,953.61/99,868.41 = 61,513.38/x
  3. Step 3: Cross multiply
    66,953.61x = 99,868.41 × 61,513.38
  4. Step 4: Simplify right side
    66,953.61x = 6,143,243,454.33
  5. Step 5: Solve for x
    x = 6,143,243,454.33/66,953.61
  6. Step 6: Final answer
    x = 91,753.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.