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Finding the Fourth Proportional to 152,915.75, 211,023.74 and 85,847.75

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Solution

The fourth proportional to 152,915.75, 211,023.74 and 85,847.75 is: 118,469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,915.75 : 211,023.74 = 85,847.75 : x
  2. Step 2: Convert to fraction form
    152,915.75/211,023.74 = 85,847.75/x
  3. Step 3: Cross multiply
    152,915.75x = 211,023.74 × 85,847.75
  4. Step 4: Simplify right side
    152,915.75x = 18,115,913,275.59
  5. Step 5: Solve for x
    x = 18,115,913,275.59/152,915.75
  6. Step 6: Final answer
    x = 118,469.90

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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.