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Finding the Fourth Proportional to 90,515.88, 124,915.57 and 54,698.90

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Solution

The fourth proportional to 90,515.88, 124,915.57 and 54,698.90 is: 75,486.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,515.88 : 124,915.57 = 54,698.90 : x
  2. Step 2: Convert to fraction form
    90,515.88/124,915.57 = 54,698.90/x
  3. Step 3: Cross multiply
    90,515.88x = 124,915.57 × 54,698.90
  4. Step 4: Simplify right side
    90,515.88x = 6,832,743,510.55
  5. Step 5: Solve for x
    x = 6,832,743,510.55/90,515.88
  6. Step 6: Final answer
    x = 75,486.68

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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.