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Finding the Fourth Proportional to 191,621.52, 287,555.26 and 128,512.88

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Solution

The fourth proportional to 191,621.52, 287,555.26 and 128,512.88 is: 192,851.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,621.52 : 287,555.26 = 128,512.88 : x
  2. Step 2: Convert to fraction form
    191,621.52/287,555.26 = 128,512.88/x
  3. Step 3: Cross multiply
    191,621.52x = 287,555.26 × 128,512.88
  4. Step 4: Simplify right side
    191,621.52x = 36,954,554,621.75
  5. Step 5: Solve for x
    x = 36,954,554,621.75/191,621.52
  6. Step 6: Final answer
    x = 192,851.80

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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.