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Finding the Fourth Proportional to 66,440, 91,687.28 and 36,632

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Solution

The fourth proportional to 66,440, 91,687.28 and 36,632 is: 50,552.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440 : 91,687.28 = 36,632 : x
  2. Step 2: Convert to fraction form
    66,440/91,687.28 = 36,632/x
  3. Step 3: Cross multiply
    66,440x = 91,687.28 × 36,632
  4. Step 4: Simplify right side
    66,440x = 3,358,688,440.96
  5. Step 5: Solve for x
    x = 3,358,688,440.96/66,440
  6. Step 6: Final answer
    x = 50,552.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.