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Finding the Fourth Proportional to 65,915.36, 90,955.90 and 37,231.96

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Solution

The fourth proportional to 65,915.36, 90,955.90 and 37,231.96 is: 51,375.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,915.36 : 90,955.90 = 37,231.96 : x
  2. Step 2: Convert to fraction form
    65,915.36/90,955.90 = 37,231.96/x
  3. Step 3: Cross multiply
    65,915.36x = 90,955.90 × 37,231.96
  4. Step 4: Simplify right side
    65,915.36x = 3,386,466,430.56
  5. Step 5: Solve for x
    x = 3,386,466,430.56/65,915.36
  6. Step 6: Final answer
    x = 51,375.98

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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.