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Finding the Fourth Proportional to 66,439.50, 91,686.51 and 36,631.50

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Solution

The fourth proportional to 66,439.50, 91,686.51 and 36,631.50 is: 50,551.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,439.50 : 91,686.51 = 36,631.50 : x
  2. Step 2: Convert to fraction form
    66,439.50/91,686.51 = 36,631.50/x
  3. Step 3: Cross multiply
    66,439.50x = 91,686.51 × 36,631.50
  4. Step 4: Simplify right side
    66,439.50x = 3,358,614,391.07
  5. Step 5: Solve for x
    x = 3,358,614,391.07/66,439.50
  6. Step 6: Final answer
    x = 50,551.47

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1.5x scale

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.