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Finding the Fourth Proportional to 128,013.52, 191,602.02 and 115,736.36

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Solution

The fourth proportional to 128,013.52, 191,602.02 and 115,736.36 is: 173,226.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,013.52 : 191,602.02 = 115,736.36 : x
  2. Step 2: Convert to fraction form
    128,013.52/191,602.02 = 115,736.36/x
  3. Step 3: Cross multiply
    128,013.52x = 191,602.02 × 115,736.36
  4. Step 4: Simplify right side
    128,013.52x = 22,175,320,363.45
  5. Step 5: Solve for x
    x = 22,175,320,363.45/128,013.52
  6. Step 6: Final answer
    x = 173,226.39

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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.