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Finding the Fourth Proportional to 66,639.58, 91,962.71 and 38,344.70

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Solution

The fourth proportional to 66,639.58, 91,962.71 and 38,344.70 is: 52,915.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,639.58 : 91,962.71 = 38,344.70 : x
  2. Step 2: Convert to fraction form
    66,639.58/91,962.71 = 38,344.70/x
  3. Step 3: Cross multiply
    66,639.58x = 91,962.71 × 38,344.70
  4. Step 4: Simplify right side
    66,639.58x = 3,526,282,526.14
  5. Step 5: Solve for x
    x = 3,526,282,526.14/66,639.58
  6. Step 6: Final answer
    x = 52,915.74

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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.