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Finding the Fourth Proportional to 66,117.79, 99,079.42 and 39,072.29

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Solution

The fourth proportional to 66,117.79, 99,079.42 and 39,072.29 is: 58,550.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,117.79 : 99,079.42 = 39,072.29 : x
  2. Step 2: Convert to fraction form
    66,117.79/99,079.42 = 39,072.29/x
  3. Step 3: Cross multiply
    66,117.79x = 99,079.42 × 39,072.29
  4. Step 4: Simplify right side
    66,117.79x = 3,871,259,583.57
  5. Step 5: Solve for x
    x = 3,871,259,583.57/66,117.79
  6. Step 6: Final answer
    x = 58,550.95

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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.