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Finding the Fourth Proportional to 66,608.66, 91,915.55 and 37,931.25

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Solution

The fourth proportional to 66,608.66, 91,915.55 and 37,931.25 is: 52,342.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,608.66 : 91,915.55 = 37,931.25 : x
  2. Step 2: Convert to fraction form
    66,608.66/91,915.55 = 37,931.25/x
  3. Step 3: Cross multiply
    66,608.66x = 91,915.55 × 37,931.25
  4. Step 4: Simplify right side
    66,608.66x = 3,486,471,516.28
  5. Step 5: Solve for x
    x = 3,486,471,516.28/66,608.66
  6. Step 6: Final answer
    x = 52,342.61

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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.