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Finding the Fourth Proportional to 128,915.66, 193,370.45 and 75,943.59

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Solution

The fourth proportional to 128,915.66, 193,370.45 and 75,943.59 is: 113,913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,915.66 : 193,370.45 = 75,943.59 : x
  2. Step 2: Convert to fraction form
    128,915.66/193,370.45 = 75,943.59/x
  3. Step 3: Cross multiply
    128,915.66x = 193,370.45 × 75,943.59
  4. Step 4: Simplify right side
    128,915.66x = 14,685,245,793.20
  5. Step 5: Solve for x
    x = 14,685,245,793.20/128,915.66
  6. Step 6: Final answer
    x = 113,913.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.